When "Paul Bunyan" swings his ax at the Cuda, he takes it out again and swings at Nash's head. When Nash looks back at the hood of the Cuda, the ax is buried in it, despite the fact that "Paul Bunyan" only swung once at the car.
At about 23:50, when Nash shoots one of the suspects, he falls forward and you can see the squib control wire running out of his pant leg and across the floor.