If you want to see some real craziness, this is the Tetris GM exhibition Alex mentioned in the run. It's nuts.
Some of the most impressive, mindblowing shit I have ever witness in my time upon this earth. Just INCREDIBLE
That whole segment was phenomenal. It was crazy how they could explain what they were doing and concentrate at the same time. I can't imagine how good the Japanese community is compared to these guys if they're the only ones to ever get the highest rank in TGM 3.