In this eight-minute video, Tetris master Matt Buco maxes out NES Tetris -- achieving 999,999 points. According to Twin Galaxies, only three other players in the world have achieved this feat.
If you ever played Tetris on the NES, this video may give you bad dreams. Buco starts on Level 18, as do many high-level Tetris players, and the speed jacks up to supremely insane levels within minutes. Watch it if you dare!
If that's not intense enough for you, check out my old post on Advanced Tetris Gameplay from 2007, complete with panic-attack-inducing video.