My *funniest* dream of all time was one in which I was watching a movie on cable.
In this movie, a guy at a dinner party was lusting after some hot chick. He had been looking around for her for some time, and he finally spotted her across the room, and reacted in a rather Looney Tunes-ish sort of way, opening his mouth and wagging his tongue around.
Once the people between him and this woman had dispersed, he leapt through the air, with the intent of pouncing on this woman. The film cut to slow-motion as he drifted, fakey-special-effects and all, through the air.
But then it cut to a shot from the flying guy's point of view and the woman (who had not seen him) walked away, and standing immediately behind her, grinning lopsidedly right at the camera, was H. Ross Perot.
The shot then cut back to the guy's face, which instantly changed from ecstasy to horror, and he started flailing his limbs helplessly and screaming "Nnnnnnnooooooo!" all slowed-down.
I woke up laughing. I can only remember doing that once.
I also remember the worst dream I ever had. It involved nuclear war and I woke up terrified out of my skin, and also filled with despair. It took days for me to get over it.