Well, you know me Toosey, i believe you've gotta leave space in your beliefs for 'the unknown' and 'the unknowable' and all that.
...but...
I'm not particularly sold on ghosts.
Here's a natty little proof of how one type of ghost-experience can be generated.
Basically, there are certain types of 'vibration' that cause certain body parts like the eye to vibrate subtly, triggering a 'someone or something is nearby' type of feeling. The natural response, having turned round a few times, is to assume some nigh-invisible presence is about the place. [It can even cause the appearance of a blurred 'shape' to appear at the periphary of vision - as well as other unsettling physical effects]
Apparently, this is one of the many types of vibration that they make sure don't occur in cars. Which is handy, coz not only does it means your windows don't rattle on long journeys, it means you also don't spend the entire time convinced there's someone sitting on the empty back seat
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Generally, i'm not sold on ideas of afterlife etc. As for other Supernatural stuff, what sort of thing were you thinking of?