This is not a tech story but a customer story. I was cashiering at an upscale arcade. Whenever we rang out a customer the register display would say "Check Closed." This caused some confusion to the customers. I had one woman walk up after I had just finished another customer. She looked at the display, sighed in an exasperated way, and said "Oh you're closed too? That's the second time today!" And she walked away before I had a chance to correct her.