Watch Mario glide through the a heart attack of pits, maneating plants, and flying saws and zero floor space that is Item Abuse, the hardest Super Mario level ever. 

It's not real, of course; according to YouTube, this is tool-assisted speedrunning, i.e., hacked. Speedrunners are gamers who beat games as quickly as possible. Is it humanly possible? If it is, the internet will hear about it.