Well alright that seems reasonable.

I was thinking some sort of expression where it was common to say “never makes a dud” made literal since it’s a bomb factory. All I could find along those lines is a reference to a shampoo brand (“Huron”).

Either that or some kind of commentary about how bombs suck and a “successful” bomb is a terrible thing so they hate him for always making a successful killing machine. But that doesn’t seem in line with the Far Side oeuvre.