I used to have this dream every night as a kid. I was always on the stairs here at home and there were two handrails/banisters. One was red, one was blue. One for going up, the other, coming down. I used to know which was which, but then one night I forgot and used the wrong one. The punishment for doing this was to fall.

Lately, my mind has either recalled or made up a little demon creature telling me that I was wrong to hold the wrong one and that I was going to fall. I'm not sure if this ever truly happened in my dream though.