This is a piece of Japanese black theater in which people dressed in all black do a bunch of crazy shit that looks awesome. In this case, reenact some Super Mario action. I highly recommend checking it out. And for those of you that can't watch at videos at work, well, freaking quit already. You're under appreciated anyways.
Thanks to Arran, who did the exact same thing for the first level in Contra, but the theater burnt down before he could perform. I'm sure it would have been awesome, Arran.