Zach Drops By The Set: Galifianakis Ruins NBC Shows (VIDEO)

Last night's digital short let Zach Galifianakis do what he does best: be Zach Galifianakis. With him goofily popping up in NBC shows like "Law and Order" and "30 Rock," the sketch celebrated Zach's 30 years on TV. It was a fitting tribute and perhaps the highlight of the show.