My best dream sign is when I'm falling, it forces me to realize that I'm dreaming because I can't hit the ground because then I'm dead and that only happen in dreams. Every time I have fallen I have become lucid.

Last night was pretty annoying though.. I was falling and I became lucid and started to fly instead. I did kind of a loop lik airplanes do in movies when they are about to crash, but when I looked up I bounced into a concrete house wall and woke up. 2 sec lucid because of that damn house