Lou:
You gonna order something, kid?
Marty McFly:
Ah, yeah... Give me a Tab.
Lou:
Tab? I can’t give you a tab unless you order something.
Marty McFly:
Alright, give me a Pepsi Free.
Lou:
You want a Pepsi, PAL, you’re gonna pay for it.
My first thought also
When I saw the article this is what first popped into my mind.