Pitch Perfect [1] star Skylar Astin makes an awesome guest appearance on this week's Glee as the leader of Throat Explosion, a rival glee club. He plays kind of a jerk who challenges the glee club at Nationals, but he does give one heck of a performance of "Mr. Roboto" by Styx and "Counting Stars" by OneRepublic. Seriously, he's so talented, it's completely ridiculous, kind of like the name "Throat Explosion."