I actually owned an NAA .22 Short single shot derringer for a short period of time.
A buddy and I were playing pool, and doing rather well at it one evening. One fellow kept going double or nothing... After the last one, he pulls the thing out of his pocket, everyone in the bar hits the floor, and he sheepishly asked "Would this be good for it?" Whew.
Sure thing it was. I took possession, and after a bit of consideration, it went into a storm sewer...