Once, I was dreaming about me walking in the middle of a REALLY foggy street with three classmates. We knew we shouldn't be there, but we were all like "okay, we can do this as long as we're together!" until I said "but what if one of us is dreaming? Then it won't be real for the dreamer, but it will be real the rest of us... it's not fair!" Then we decided that if anyone was dreaming, they should wake up immediately, and two of them simply disappeared. I looked to the only girl left and we were all like "CAN YOU BELIEVE THOSE BITCHES!? THEY WERE DREAMING THIS WHOLE TIME!!!" and we laughed a little... until I woke up.

However, I had no idea what LDs were back then, so I probably would've done nothing about it anyway.