memorable

Hey, I've been spinning in my dreams a lot. For example, i was on my way to sleeping and I found myself spinning and then going down a hole with all kinds of things and beings. I've noticed the more relaxed I get the faster I go... and as I surrender it feels really good, almost like flying. I sometimes spin upside down, like a top... again, as I relax, I spin faster. Does anyone know what this means? Is it common?