Probably one of the strangest dreams I've had is dreaming in a dream. I first dreamed that I was going through a rough day of work, then I decided to take a rest on a nearby bench. Well, thing is I went to sleep again. Can't remember what my second dream was but when I "woke up" I was still there on the bench. Shortly after that I woke up again and really was awake then. But it was just freaky.