I've known Dave all my life - we even served in the military together.
Anyway, we constantly play jokes on each other.
He's a proctologist, and due to family history, I have to get a yearly exam.
Before I left for his office, I had set a Hershey bar in the sun. I scraped it off the wrapper, and put in my underwear.
You should have seen the look on his face when he had me drop my pants and bend over. I was like, "what's the matter??
I had told his nurse before hand what would happen, so she just burst out laughing when Dave said, "Gary, that's nasty."