Customer: Can I get a medium vanilla thickshake? Thanks.
Cashier: I'm sorry, what?
Customer: Can I get a medium vanilla thickshake?
Cashier, looking confusedly at cash register: What flavor?
Customer: Vanilla.
Cashier, after long pause: What size?
Customer: Medium, or regular, or whatever the middle one is.
Cashier: (looks blankly ahead for a few seconds then gets manager)
Customer: Fucking hell.

McDonald's
Perth
Australia