Dreams do some of the craziest of stuff.
I always enjoyed them (Even nightmares) once I started realizing they had the best special effects. It was after I made that conscious decision that I stopped having them as much.
Nightmares don't seem to want to stick around when you get a kick out of them. ;)
I know how that is. I've found it true too that nightmares disappear when you find that out about them.