This is a reference to the fighting game player Umehara (Daigo). One is a reference to a particular video with an overzealous commentator commentating Umehara's play: http://www.youtube.com/watch?v=2QTECmJPi0w The other, perhaps more famous, is from the EVO 2004 Street Fighter Tournament where Umehara makes an almost miraculous comeback and wins the round: http://www.youtube.com/watch?v=v7cW2nMf1gk
Forgot to mention, the first video is the bubble to the right, the second video is the bubble to the left. (Also the supposed "Let's go Justin" might in fact be "Way to go Justin".)