At the beginning of the film, when the truck arrives, no snow is on the road. When the boy throws his snowball, traces of snowballs from previous takes are visible beneath the truck. When the truck leaves, the snow is gone.
When crossing the river for the first time, the car drives down a ramp with trees to the side. Leaving the river at the other side of the crossing, the same trees are visible.
When the state trooper checks out at Yankee Dollar, Ray tells him the total is $3.76. Over his shoulder, a sign on the wall that says that all items are $1.00. At the time, the sales tax in St. Lawrence County, which includes Massena, was 7%, so the total should've been $3.21.