Rocks Have Urges, Too

lady: is this where we meet the man for the tour?
me: he parks right outside.
lady: outside??
me: ...yes, he parks just there, outside, where that other bus is currently parked.
lady: ..but outside?
me: well, yes, he parks the tour bus -outside-
lady: oh, I see.
-not five seconds goes by-
lady: wait, is he here?
me: uh.. well, no, when he gets here, he parks where -that other bus- is currently parked.
lady: so that's not his bus?
me: ...no.
lady: well, what's that bus, then?
me:
me:
me: ma'am, that's a school bus.