Snowmelt runs off the track, into a culvert then into a pipe and under. Amy stares at it, standing on the edge of the road. Three cars hoon past. A snowball comes from one of them and hits Amy's red backpack.
Penny Marx laughs. 'You're a good target, Amy.'
Amy says, 'Fair enough,' then jumps on Mai's back and pulls her to the ground.
'Hey, hey, not on the road!' says Tommy Tompson. 'Let's get back on the track.'