Conversations with the waiter

I have a feeling there will be no end to the "conversations with the waiter", they are so often memorable here. This one is a submission from a repat that doesn't blog.

Sitting at Square One, one of us orders a hamburger, the other a chicken burger. When the waiter brings out two plates, it's obvious that they are identical.

Me (pointing to friend's plate): Excuse me, what is this?

Waiter: What did you order?

Me: Huh?

Waiter: What?

Me: I want to know what this is that you just brought out?

Waiter: Then tell me what you ordered.

Me (still pointing to friend's plate): Why do you need to know what I ordered before you tell me what this is?

Waiter: Well, how am I supposed to know what THAT is if you don't tell me WHAT you ordered?