If you’re an alien…
If you are an alien, from outer space, then I’ll forgive you. You are on a strange planet and don’t know our customs.
HOWEVER, if you are a member of the human race, you have no excuse for this:
Me: “Hi there, your total is $4.40, how are you?”
You: “_____” (Silently thrusts your payment at me)
Me (handing you your food): “Here you go, have a nice day”
You: “_____” (Drives off in silence)
If you’re this person, open your mouth, say thanks, say something. Otherwise rest assured knowing that when you drive away silently, I yell at the (closed) window, “YOU’RE WELCOME ASSHOLE”.

