M*A*S*H - Naked Hawkeye
Hawkeye made a bet that he could walk into the mess tent naked and no one would notice. When he walks into the mess tent, the camera shows a shot of him from the waist up, but if you look closely, you can see the top of his shorts or pants at the bottom of the screen.
to see the episode where Hawkeye makes a bet that no one notices him
on 11-30-2001 and