Most impressive gaming feat you've seen?

[LegitHyperbole]

Leynos said:

This guy who 1CC Ikaruga with 2-player mode. One hand for each player. I cannot express how impossible this is. The game alone is one of the most difficult games to master in the genre. Which is one of if not the most difficult genre that exists.

Idk what I'm watching but it looks impressive all the same.