(There is an ID check to enter the lab and to print.)

Me: “Hi, can I see your ID please?”

Guy: “No, I don’t need ID to come in here.”

Me: “Yes, at this lab it is required.”

Guy: “But I don’t need an ID to come in!”

Me: “I’m sorry, but I really need your ID or I can’t let you come into the lab.”

Guy: “Oh I need ID to come in? Why didn’t you just ask me for it?!”

Me: *headdesk*

Related:
Zero Short Term Memory
Short Term Memory Is For The Weak