One time when I was a kid and worked at a liquor store, we found out that the pole with a hook on it that was used for pulling down the six packs from the top shelf actually made a wicked beer opener if you slammed it down on top of the mouth hole.
Then we also found out that 12 cases on top of one another created tremendous pressure on the cans at the bottom of the stack. A quick swipe of our car keys through the handle would relieve this pressure in the most glorious fashion.
I worked there for like, 3 months. I guess that's what you get when you're a tremendous dick and you hire two 14 year olds to carry cases of beer up the most rickety flight of stairs ever made for 3 hrs every day after school.
Water.