I want to present you my prototype of a bottle opener, which reminds me of some kind of catapult.
First of all, here's a video of how it works
In the video you cant see how far the bottle cap flies, but i can tell you: It flies through the whole room and you might have to search it. And beware: Dont let somebody stand in front of the bottle opener, he might get hurt ;-)
PS:I hope you can understand me, Im from Germany ;-)