Of course, the boy in question looks a bit young to actually be a trained mechanic, despite his confidence. Or a trained anything, really: he can't be more than seventeen or so. But his eyes are bright and earnest.

"I could have a look at it while the bus is running," he begins, "and only stop us when I'm really ready to--" And he cuts off, belatedly registering that final question. "Watch? It's pretty tedious. I wouldn't want you to get bored or anything like that."