When you or a small Girl Scout knocks on a strangers door to sell some cookies, and immedeately about 16 german sheppards attack the door, growling and barking in a rabbid fashion. Then a deranged man in a wife-beater, comes out with a shot-gun and tells you to run off. Reminding you of Fort Knox.
Girl Scout 1: "I hope this nice man buys at least one cookie, so that I can afford a new shirt, other than this one I've been wearing since I was 2."
Girl Scout 2: "I hope this isnt one of those Knox on the Door. I just want to sell one cookie."