I just bought a can of root beer from a vending machine and it got me to wondering…Why don’t cans of soda from a vending machine “explode” when you open them? The can makes a hell of a racket coming down into the little box you take it from; it sounds like it’s really getting banged around. If a can took that kind of beating in any other circumstance, I wouldn’t open it without a towel at hand. Is the vending machine somehow designed to treat the can gently, and is the banging noise from something else?