A post on my friends list about a dream reminded me of something. I woke from a faint* way back in my teen years with the conviction I was on Mars. I was rather upset, because I didn't know how to get home. To this day, this strikes me a very odd.
*I had rope burnt my hand with the help of a horse and had fainted while standing. Fell like a tree, as far as I can tell, and hit a fence on the way down. Fun stuff. Certainly rattled my brains pretty good.