When you think of the apocalypse -- filled with hell-bent creatures with a thirst for carnage, cannibals, and savages -- a Seth Rogen movie is the last thing you would conjure up in your mind. This is the End is to a Roland Emmerich movie what Shaun of the Dead is to a George A. Romero movie.
In the absence of a conflict between Dwight and Jim, another conflict took place, that was very reminiscent of the every man versus the workplace goofball. Unlike Jim, Darryl is much more spontaneous with his pranking, and Andy, unlike Dwight, was not out to cause any trouble. Darryl just happened to remember an incident from two years ago, and he was exacting his revenge on Andy.
It is typical for Michael's poor decision making abilities to have repeatedly affected the office in negative ways. As the years have passed, Michael has slowly learned to question his judgment, and to take the time to listen to his employees. "Body Language" is one of those few episodes where Michael is shown to have grown over the years.