This is nuts. I've never been able to watch someone play tetris for 6 minutes straight until today.
I found this on Larry Osterman's blog. I was impressed in the first 10 seconds, but thought it started to trail a bit after 2 minutes. But once it hit 3 minutes the speed kicked up to "You gotta be friggin' nuts!"
At about 5 minutes the credits start rolling and all the blocks become invisible, but this guy keeps going.
Utterly Insane.
Advanced Tetris Gameplay: