I don't think this is that odd. I'm similar; I have only just started getting formal dance training this semester, but my body intuits cool looking ways to move, that I then have difficulty remembering perfectly. I'm very much in the same boat as johnwentsworth, but because of my inability to remember prechoreographed moves, I only do improvisational dancing.

For example, one time I was dancing in heavy boots on a linoleum floor and I did a slide, moving several feet along the floor without picking up my boots (and also without making that annoying squicky sound). The guy next to me said "whoah that was really cool, do that again" and much to my chagrin I couldn't, and haven't been able to since.