When I was in junior high school one of our finest loud mouthed genuises was giving grief off to our gym teacher. This was a guy that may have been suffering from mental difficulties due to hair spray poisioning. His pompadour was so stiff he could have played football without a helmet. I don't remember the context but at one point the teacher shook his head and said "You ought to have your head examined." Hairspray boy came back quickly with "Oh yeah, well they wouldn't find anything." There was an awkward pause for a moment when even the teacher stared at him in disbelief. One person chuckled and the damn broke. The whole class was laughing hysterically while he glared at us all. I'm still not sure if he understood what was so funn.