This probably isn't Autism/Aspergers related, but it might be...
Does anyone here sometimes get weird thoughts like they're going to do something stupid, like jump off a building? I get this quite a lot. It's usually just little things that wouldn't really matter, like sticking my finger inside a cat's mouth when they yawn. But sometimes it's scary things like throwing myself from the 4th floor at my university building (the corridors go round so it would be really easy to do, I'd just climb over the bar) or when I go to a train station, I feel like I can't go near the edge or I'll jump onto the tracks.
I don't actually want to do these things though, I just feel like I will have no control over it and do it anyway. This is probably just me though...

I actually get those urges all the time. Basically, I get all these urges to do bad/stupid/misbehaving things and I can keep it in.