I discovered as a child (no beer involved ok?) that if I jumped very hard on a post laying across a concrete block I could make it fly magnificently high in the air, because you know, physics! It was fun by myself, but I called a friend over to see this marvelous thing I had discovered and remember quite well saying "hey watch this", jumped as high as I could and landed perfectly on the end of the post, which proceeded to fly up in the air as promised, knocking me in the head on the way up with tremendous force, next thing I know blood is being wiped from my forehead while I laid on the floor in a nearby building that I was not inside before...I still have a scar on my eyebrow...also shot myself between the eyes with a BB gun due to a richochet...not my proudest moment, lol