Customer: “I need oil for my car. I need the 10-40.”

Me: “I’m sorry, we’re out of that.”

Customer: “Well, go get some more.”

Me: “I can’t just do that. I could order some for you, and it will be here in a couple of days.”

Customer: “No! Just go back there!” *points to the storage room* “Get some from the tap.”

Me: “The tap?”

Customer: “I know that every gas station is connected to the oil rigs in the North Sea!”