I discovered this a few days ago, just never got the chance to post it. This is an original idea discovered by me, I did not take it. Anyways, go to the AC Stage, go on the moving platform and walk in the opposite direction it's going (you can't spring, but you can walk, quicker walk, but no sprint) and you moon walk .
The conveyor belt does not do it as well, it's kind of glitchy. But on the AC Stage it works smoothly until the end of it's path (going across the screen).