Vivid dreams is putting it mildly these days. Just spent 13 hours sleeping and was in some different reality/universe on a large ship being protected from the deadly radiation of the local sun (which I was then granted some sort of protection from later) and fighting other creatures. I'm often different "people" or characters in my dreams too. I wake up exhausted, have nightsweats, have also been accused of twitching, etc.
I'm an RN and have studied this with a personal interest.