When I was in HighSchool I took Advanced Math(Trig). in this class you would end with a filled up sheet of scratch paper. so I would crumple it up and throw it into the trashcan (Blue Plastic 50 Gallon barrel with the top cut off) that sat 5 feet in front of me.(important detail)

Now other people would also throw their crumpled up sheets AT the trash can. (Second important detail) This resulted in the teacher getting upset and saying "Next person who throws a wad of paper at the trash can and misses has to write up a proof showing why they missed. It must run to at least 3 pages and include the physics about it as well."

I immediately throw my wad of crumpled up scratch paper into the trashcan.

Teacher: Make sure you don't miss.

Cut to a week later. And the backfiring revenge.

I continue to throw my wads of crumpled up scratch paper into the barrel.

My fellow students decide to have little revenge on me. They move the barrel 5 feet to my right.

I do not notice.

I crumple up my my scratch paper and throw it where the can always was.

When it is about 1 foot above the can I realize it has been moved.

At this point I am thinking I am screwed but I have a smug look on my face. Remember do not show fear.

The door to the room opens at this point and the pressure differential between the room and the hallway causes my paper ball to be pulled 5 feet to the right and drop dead center into the Barrel! WIN!

The other students demanded I do the proof. I say it went in. and do a little fast talking about how I had seen the person about to open the door. I didn't really see them. I just got lucky.

After this, the teacher goes to assigned seating. And he rearranges the desks every day. he also had the trash can moved everyday. He has me sitting in a different place everyday for the rest of the year.

I never wrote the proof. I never stopped throwing the paper wads from my seat into the trashcan. I never missed!

I got a B in the class even though I flunked the Final. I guessing He gave an B due to having to use Trig to make the shots. I was bouncing them the walls and the ceiling. Once I even bounced it off of his back.