Speedrunning mastermind Karl Jobst has played Goldeneye, Super Mario 64 and The Legend of Zelda: Ocarina of Time at the same time, and has completed them all in under an hour. This is actually insane.

Using three standard N64 consoles & controllers, Jobst times all the situations to perfection: completing levels in Goldeneye while cutscenes in Zelda play out, leading to a total time of 51 minutes. 

I know speedruns are never necessarily the most thrilling things to watch, but this will blow your mind.