(I’m following this customer around the store, as he keeps opening things. Each time I tell him to stop, he insists that it was already open, even though he sees me watching.)

Me: “Sir, please don’t open that. Other customers won’t want to buy it if it’s been tampered with!”

Customer: “Fine! Just give me this stuff!”

(The customer tosses a handful of wrappers and things that he had already opened. I quickly ring him out and when I give him his total he flips out.)

Customer: “Where’s my discount! All of this stuff is opened. I should get a discount!”