The band is Underoath (yes, I know, "Christian metalcore" but the tickets were free and the night was great). Keep watching for his near aneurism toward the end.
Another band on the same night was The Smoking Hearts, a bunch of affable lads from England. Here's my tribute to the bass players' hair:
And just for context here's a full song by The Smoking Hearts from the same night:
(Sorry about the sound but my little camera did it's best)