Back on my experimental stand up days I used to do this skit in which I listened to someone's dream and improvised a ridiculous reason for the dream. Let me see if I still got it.

Well first of all, you took your date to a dance and not to the hospital, something I'm not too proud to say that I did more than once, with bleeding involved. But your dream clearly shows that she was not really sick. She was narcoleptic. Hmnnn, but wait! Weird girl, overprotective mother, a prom... I feel you've been watching "Carrie" way too much!