As a mechanized infantryman we used to send the cherries down to the motor pool with a ball pean hammer and a piece of chalk and tell them to knock on the armor of the Bradley fighting vehicles and mark the soft spots. There are no soft spots in armor, but one day this kid found five. Imagine the platoon sergeant's words when he came asking us why his vehicles had all these white X's all over them. Then there's the chemlight batteries, the Bradley exhaust sample taken by holding a trash bag over the exhaust port, the 25mm cannon blank adapter (no such animal) and of course asking the new butter bar (lieutenant) to check the air pressure in the road wheels. (They're solid rubber)