For my high school physics group project we built a 20 foot air compressor powered potato cannon. We got a few good shots off across the football field before o

For my high school physics group project we built a 20 foot air compressor powered potato cannon. We got a few good shots off across the football field before one of the joints failed spectacularly. Fortunately no one was injured, aside from some temporary hearing loss. I have no idea why they let us do that, and I'm pretty sure we got an A, but this is absurdly on the other end of possible reactions.