As a part of my Arcade project I am working on, I decided to add a dunk-em game. I saw charzhoopz The Dunk Tank and thought I could make one, but fairly more realistic. I didn't bother to make it look pretty, so it's basically just a square, and I used World Edit to copy this into a Schematic, so there's a random piece of floating Obsidian. The throwing line that appears in some of the pictures is not included in the Schematic, I figured some people would want to pick their own throwing distance.

Anyways, throw a Snow Ball at the painting and hope they fall onto the Pressure Plates. Since it's so easy to hit them, the fact that the pictures may pop out of the glass tube adds a bit more realistic effects. You manually have to reset the paintings every time, but if you just walk up to the corner of the glass tube you will get the painting out, resetting the Pistons, and not wasting the painting.