My mate told me that at a party when we were all pissed and lying in bed about to sleep, my girlfriend didn't sleep that night 'cause she was scared she would hit the ground and die, and I couldn't stop laughing at either of them.
He also told me that "If someone pulls a specific hair from your head, (it's like, a special hair), that you die.
Neither of these have a factual basis, neither does "If you sneeze, cough, burp, fart and whatever else it is, at the same time, you shit yourself and die."
I also have the falling spasm thing loaaaaaaaads.
http://en.wikipedia.org/wiki/Myoclonus - If you're interested.