Here's how fast this game of Tetris is being played. 40 lines in 19.68 seconds. It's incredible. Is this guy even human?

This video, of a Tetris "sprinter" who goes by Keroco is probably the best player in the world.

Mental Floss has a more in-depth breakdown of what's happening, and Keroco cranks out 40 lines in 19.68 seconds. It's the first time anyone has ever beaten the 20 second barrier.

Check out Keroco's YouTube page, which documents the slow climb toward perfection.

[Mental Floss via Washington Post, h/t grapefrukt]