15. Two Birds with One Stone

A: When are we going to stop?

B: We'll stop at the next McDonald's.

A: How far away is that?

B: I think we'll be there in half an hour.

A: I hope so. I have to go to the bathroom.

B: Well, I can always pull over.

A: No, thank you, I'll just wait.

B: We can kill two birds with one stone.

A: What do you mean?

B: While you're using the bathroom, I'll order some food.

A: Don't order for me. I'm not hungry.

B: I'm very hungry. I'll order for you, and then I'll eat yours.