Choose someone to be the psychiatrist. Their job is to figure out what is wrong with the rest of the group.  Have them leave the room (or otherwise be out of ear/eyeshot) while the remainder of the group determines secretly what is wrong with themselves. IE: each person is pretending to the person two seats to their right. Everyone sits in a circle. When the psychiatrist asks person 1 questions, person 1 answers as if they were the person sitting two seats to their right. If person one answers wrong, then the person two seats away yells out anti-psychiatrist! and everyone jumps up and sits next to someone else. This game can go on forever but is hilarious. It should be played with a group that knows each other fairly well.