A lad comes up to me as we arrive at the station. He’s been sat at the back of the bus for over 90 minutes and is looking somewhat nonplussed

Lad: What number bus is this, drive?
Me: It’s an 8
Lad: Oh. It’s not a 4?
Me: Nope, an 8
Lad: I thought it was a 4
Me: Well, you were half right…
Lad: Eh?