Donnie Darko is trapped inside a tangent universe, or parallel, doesn't matter. He in in this universe due to some form of corruption that appeared in the primary universe. He now has so many days to correct what went wrong or the end of the world will commence. Although some people have said that the tangent universe loops, so really would the world end? I don't know. I still have a few things to work out myself. But I'm pretty sure then the time ends the tangent universe will collapse and destroy the earth.

So Frank, the rabbit can communicate with Donnie and gets him to do these certain tasks, flood the school, burnt down pedo guys house and then we meet on Halloween. These tasks are designed to help Donnie get to the final hurdle.

When Donnie is in this tangent universe he has super powers. (strength, fire and telekinesis) hence how he did some things. The school was flooded so he could meet Gretchen coming home from the bus stop, saving her from the bullies and he burns the house down so that the coach of the dance group wouldn't be able to take the girls to the dance. Donnie's mum had to do it. This allowed him to party with no parents around and he goes out, meets frank, gretchen is killed and he goes to where the plane is and sends the engine back into the real earth with his powers, killing himself.

Now I'm not sure if he knew he was going to die and I'm not sure if anyone knows this for a fact. But the ending itself when the people are crying ect, and looking confused just means some of them have memories of what happened in the tangent universes.

Anything else you need to know? I hope that was enough.

Donnie Darko is trapped inside a tangent universe, or parallel, doesn't matter. He in in this universe due to some form of corruption that appeared in the primary universe. He now has so many days to correct what went wrong or the end of the world will commence. Although some people have said that the tangent universe loops, so really would the world end? I don't know. I still have a few things to work out myself. But I'm pretty sure then the time ends the tangent universe will collapse and destroy the earth.

So Frank, the rabbit can communicate with Donnie and gets him to do these certain tasks, flood the school, burnt down pedo guys house and then we meet on Halloween. These tasks are designed to help Donnie get to the final hurdle.

When Donnie is in this tangent universe he has super powers. (strength, fire and telekinesis) hence how he did some things. The school was flooded so he could meet Gretchen coming home from the bus stop, saving her from the bullies and he burns the house down so that the coach of the dance group wouldn't be able to take the girls to the dance. Donnie's mum had to do it. This allowed him to party with no parents around and he goes out, meets frank, gretchen is killed and he goes to where the plane is and sends the engine back into the real earth with his powers, killing himself.

Now I'm not sure if he knew he was going to die and I'm not sure if anyone knows this for a fact. But the ending itself when the people are crying ect, and looking confused just means some of them have memories of what happened in the tangent universes.

Anything else you need to know? I hope that was enough.