One day, during one of our many sales, we have a DVD player with a $20 MIR (Mail In Rebate) on it.
This old guy buys one, and as a coworker explains how to get the MIR (Instructions are on receipt, but people are idiots) when she gets to the part about the UPC. The guy totally flips out. Yelling and screaming about how it is his DVD Player and how we had no right to ask for his UPC.
Coworker (who is tired of this bull): "You are right sir, it is your DVD Player, and you don't have to send your UPC. You just wont get your Money."
This pissed him off even more. Now he's yelling at the top of his lungs, sounding like he's about to cry. Now the man and my coworker are feeding off the other person's anger, because they keep getting louder and louder...
Eventually, it takes me and another employee to calm them down. Once the guy returns the DVD player, he storms out stamping his feet and hitting walls on his way out.
When he left, all the other people in the store cheered and applauded. Man I hate retail.