I once had a dream like that, only it was of tremendous speeds. I believe I was sick with pneumonia at the time, but I remember other times that it had happened when I was perfectly healthy and right of mind. I would be standing on this track, naught but 10 feet or so wide, and it stretches out to infinity. Sometimes it curves forwards like an apple, but never touching itself, and I never see anything other than the track that I am on; even when it should be visible around me.
I would start out slowly, my feet touching what would be best described as a yellow or gold conveyor belt; someetimes it would even be multicoloured. My speed would gradually increase from zero to what feels like Mach 1, yet I feel no distortion of my body, only the speed. I would end up continuing on this track for what felt like a lifetime, slowing down and believing it was over, just to have it start up again. I would eventually wake, feeling not very rested.