Back to the future 2? Try to explain that

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Is anyone can explain me that
After Biff steals the Delorean to change his pass he bring it back in 2015. But there's no change at all in 2015 but when Marty and Doc return to 1985 everything had changed. So how Biff doesn't came back in 2015 without any change? How can they made a big mistake like this??? Do i missed something?



Also why Biff bring back the Delorean and giving Marty the chance to change his plan. He should destroyed it or hide it?? No?



Welcome to the human race...
The first Back to the Future established that changes to the timeline happen relatively slowly - if the changes were instantaneous, Marty would've disappeared completely as soon as he interrupted his parents' first meeting (as opposed to the photograph that shows him and his siblings slowly being "erased from existence" over the course of a week). As it happens, the change is slow enough that old Biff is able to return to 2015 just before the alternate timeline takes hold in 1985. As for why Biff brings the DeLorean back to 2015, keep in mind that Biff is not the smartest guy in the first place. Taking that into account, I'm guessing that bringing it back is his idea of hiding it.
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Thanks i like your explanation so i'll accept it as a fact and close the case.



Kakarot89: The Infamous Thread Killer
I know you closed the case but I really wanted to come in and save the day with the answer from the official FAQ:


What happened to old Biff when he staggered out of the DeLorean in 2015?
Our intention regarding old Biff was that upon his return to 2015, he would be erased from existence because he had changed his entire destiny by giving his younger self the Sports Almanac. (Probably, Lorraine shot him sometime around 1996!). After old Biff clutches his chest and staggers (the same symptoms that Marty exhibited in Back to the Future when he was beginning to be "erased"), we actually filmed him falling onto the street and vanishing, and we previewed the movie this way. However, the vast majority of the audience did not understand it, so we decided to cut it out, leaving the answer ambiguous, and subject to various interpretations — besides the above explanation, you can believe that Old Biff had a heart attack from the shock of time travel of from flying the car, or from something that happened to him in 1955.

When Doc and Marty are in 1955-A, Doc says they can't return to the future to stop Biff from stealing the DeLorean, because it would be the wrong future. But if that's true, how did Old Biff manage to get back to the same future that he left? Shouldn't he have come back to a different future?
As should be clear from the answer to the previous question, we believe Old Biff DID indeed return to a different future — a "2015-A," which would have transformed around Marty, Doc, Jennifer and Einstein (just as Doc explains how 1985-A would change into 1985 and instantly transform around Jennifer and Einstein). This would happen AFTER Old Biff returned with the DeLorean. For this reason, we made sure that Doc had caught Jennifer and exited the McFly Townhouse before Old Biff returned. Thus, by the time Marty and Doc are carrying Jennifer back to the DeLorean, there COULD be other residents in that townhouse — or perhaps the McFlys still live there. It is just as believable that the physicality of the neighborhood did NOT change as it is to believe that it did — so we didn't change it. We decided not to make anything of this idea because this is one of those difficult time travel concepts that general audiences have a real hard time understanding. (Try explaining this stuff to your mother and you'll see what we mean.) A detailed explanation of it would have slowed down the story, and most of the audience doesn't ever think about it. That's why we made certain things ambiguous and left various things open for interpretation in hopes that the possibility of at least one or two explanations would be better than a "definitive" explanation that you could find holes in. Let's face it, time travel is fantasy, so there's no way to "prove" anything. As filmmakers, we try to create a set of rule for our stories and stick by them, and stay consistent within the little "universe" that we've created.



I know you closed the case but I really wanted to come in and save the day with the answer from the official FAQ:


What happened to old Biff when he staggered out of the DeLorean in 2015?
Our intention regarding old Biff was that upon his return to 2015, he would be erased from existence because he had changed his entire destiny by giving his younger self the Sports Almanac. (Probably, Lorraine shot him sometime around 1996!). After old Biff clutches his chest and staggers (the same symptoms that Marty exhibited in Back to the Future when he was beginning to be "erased"), we actually filmed him falling onto the street and vanishing, and we previewed the movie this way. However, the vast majority of the audience did not understand it, so we decided to cut it out, leaving the answer ambiguous, and subject to various interpretations — besides the above explanation, you can believe that Old Biff had a heart attack from the shock of time travel of from flying the car, or from something that happened to him in 1955.

When Doc and Marty are in 1955-A, Doc says they can't return to the future to stop Biff from stealing the DeLorean, because it would be the wrong future. But if that's true, how did Old Biff manage to get back to the same future that he left? Shouldn't he have come back to a different future?
As should be clear from the answer to the previous question, we believe Old Biff DID indeed return to a different future — a "2015-A," which would have transformed around Marty, Doc, Jennifer and Einstein (just as Doc explains how 1985-A would change into 1985 and instantly transform around Jennifer and Einstein). This would happen AFTER Old Biff returned with the DeLorean. For this reason, we made sure that Doc had caught Jennifer and exited the McFly Townhouse before Old Biff returned. Thus, by the time Marty and Doc are carrying Jennifer back to the DeLorean, there COULD be other residents in that townhouse — or perhaps the McFlys still live there. It is just as believable that the physicality of the neighborhood did NOT change as it is to believe that it did — so we didn't change it. We decided not to make anything of this idea because this is one of those difficult time travel concepts that general audiences have a real hard time understanding. (Try explaining this stuff to your mother and you'll see what we mean.) A detailed explanation of it would have slowed down the story, and most of the audience doesn't ever think about it. That's why we made certain things ambiguous and left various things open for interpretation in hopes that the possibility of at least one or two explanations would be better than a "definitive" explanation that you could find holes in. Let's face it, time travel is fantasy, so there's no way to "prove" anything. As filmmakers, we try to create a set of rule for our stories and stick by them, and stay consistent within the little "universe" that we've created.
Thanks but i prefer Iroquois explanation. I think they just tried to explaine a big goof... But with the first explanation it work. If fact Biff travel and come back in a milisecond and thing are suposed to start changing around him.


Like they did in the movie sound of thunder. The transformation of space follow waves...



Anyways i'll gues every solution are good. I juste needed help to find mine.



Movie Forums Squirrel Jumper
There are several questions like this in Back to the Future. For example, when Marty looks at the matchbook, it changes logos. But why would he still have a matchbook in general, on him? Shouldn't the whole matchbook disappear to say the least?



Welcome to the human race...
Depends on the change. Twin Pines Mall is named after two pine trees, one of which Marty drives into and breaks as he arrives in 1955. When he travels back to 1985, the mall is still there but now it's called Lone Pine Mall because, well, there was only one pine tree left. What matters is that the mall would still be built there anyway. As such, I think the rule here is that an object will still exist but its appearance will change in accordance with the timeline e.g. the newspaper in 2015 changing its headline once Marty beats Griff.



Movie Forums Squirrel Jumper
Oh okay, but I thought that the mall example is different though in the sense that Marty didn't take it with him. For example, if Marty changes the future, then he wouldn't visit Biff's casino building at all, and he wouldn't have the matchbook on him. Even if the matchbook would change, he still wouldn't have taken any matchbook at all, or so I thought.

Where as the mall is not something he would take with him of course, and would still be in the same spot.



Welcome to the human race...
Which is why I also brought up the newspaper, which is from the day after the date that Doc and Marty arrive in 2015 (so technically an item from the future) and has the headline about Marty Jr. getting arrested that changes to a headline about Griff getting arrested once Marty changes the course of history. Likewise, the matchbook would still be made by a matchbook company in 1985 but for someone other than Biff.



Which is why I also brought up the newspaper, which is from the day after the date that Doc and Marty arrive in 2015 (so technically an item from the future) and has the headline about Marty Jr. getting arrested that changes to a headline about Griff getting arrested once Marty changes the course of history. Likewise, the matchbook would still be made by a matchbook company in 1985 but for someone other than Biff.
Yes i'm agree with you Marty has physicly something in his hand so it can not vanish it just adjust itself.



Movie Forums Squirrel Jumper
Oh okay, but if the matchbook changed, then why would Marty stillh have it? If they changed the future, then Marty wouldn't have even been in that building to collect a matchbook in the first place. So why would he still have it therefore I meant? Same with the newspaper. Or in the third movie when Marty's gf has the fax paper that says "Your'e fired" on it. The printing disappears, but she still has the fax paper. But why would she still have it, if she was never in that house therefore then? If he wasn't fired, no paper would have even come out of the fax machine at all.



Welcome to the human race...
I don't know what to tell you, dude. Back to the Future's whole deal is playing fast and loose with time travel conventions to the point where it's practically a fantasy film (and time travel's never been that exact a science to begin with). Maybe there's a possible technobabble explanation involving quantum mechanics or somesuch that explains how someone in the past can hold onto an item from a deleted future, but that's just one of many paradoxes that the films ask you to roll with for the sake of keeping things moving.



Time travel isn't real and creates unanswerable questions, so every film about it simply has to tell you how its time travel works, and you have to accept that premise. If this film had a different version of it, you could ask questions about that, too. So either you loosen your demands for rigorousness, or else you're essentially demanding nobody make these kinds of films at all.



I think when Marty will arrive in 2015 (i mean for real) he should see himself if he wants taking the mach box and the paper in that new timeline but it will be the changed ones. Because in fact he took it. Anyways like others said every explanation are good just take the one you prefer.



Movie Forums Squirrel Jumper
Oh yeah for sure, I like the Back to the Future movies, and have no problem with the time travel. I was just talking about it .