Mike hits Dave with a stun stick.

In an episode, there is a character model which has the face of an actual burnt dead body, however the model's face in only seen for 4 seconds.

Mike says "hell" and "retard" in an episode.

Mike yells "ass" in one episode.

Mike also says "bastard" and "son of a bitch."

In one episode they start talking about drug slangs and PCP.

Half-Life 2 zombies are sometimes shown which can be a bit gruesome and scary for little kids.