At 7-Eleven, a customer in front of me was complaining at the cashier because they turned the pizza ovens off too early at night. He kept hitting his fist on the counter to make his point, so I started doing it along with him and he kept eying me, but didn’t stop yelling at the cashier. He started walking away from the counter, still complaining, and I picked up his keys and said, loudly and obnoxiously, “Don’t forget your keys, MISTER COMPLAINER!” He shut up and came back to take them from me, looking like he wanted to hit me. It ruled. That really made my day. Even moreso than this Slurpee and hot dog. Oddly enough, the cashier didn’t seemed amused by my behavior at all. If I worked there I would love for someone to shut up a loudmouth customer.