A: That was nice.
B: What was?
B: That driver let us cross the street.
A: Yeah, drivers here in Australia are pretty polite. But you know, you're supposed to wave to say thank you
B: Wave?
A: Yeah, just a short wave. I don't know, it's just what people do here.
B: That's good to know. I wasn't aware of that.
A: Yeah. It's just a friendly gesture.