Waiter: Sure, one tuna sandwich coming right up.
Customer: No, I said, a PATUNA sandwich.
Waiter: ...are you sure you don't mean a tuna sandwich?
Customer: Yes, I'd like a fresh patuna sandwich with a side of gar.
Waiter: Um...I'm afraid we don't have any of that.
Customer: WHAT?! You don't serve patuna? What kind of eating establishment is this, anyway? I'd like to speak with your manager!