The only reason why I started watching this show is because I thought (the character) Troy looked familiar. He was (is?) actually a part of Derrick Comedy and I'm sure you've all seen some of their videos before
http://www.derrickcomedy.com/2008/08/21/keyboard-kid/
http://www.derrickcomedy.com/2007/08...gative-report/
They actually made an appearance in Community when Pierce preps for punch-kicker 2 haha