*A dad walks up with his whole family’s tickets stacked up. He scans the stack, moves the top one to the back, and scans again. It doesn’t work.*

Me: “Sir, you need to scan those one at a time.”

Man: “Oh, I am.”

Me: “No, you can’t scan them when they’re stacked up like that. You have to scan them one at a time.”

Man: “I know. I am.”

Me: “No, but sir…”

*This goes on for several minutes.*