When Jon and Getraer are chasing the lady to tell her about the boy who is hanging on to the back of her car, both Jon and Getraer have on long sleeves, but during the chase, the two stunt riders have on short sleeve shirts.
When car the boy is hanging onto comes to a stop, you can see that he is sitting on a seat attached to the car and that his skates were not touching the road.
When Getraer and Jon spot the kid hitching to the back of the lady's vehicle, the stripes on Getraer's shirt appear and disappear and reappear on his shirt collar.
The first time Jimmy Tyler's driver is shown tail gating the car the spark producing car that creates a wreck, a ramp is visible at the 20:30 mark of the show. When the station wagon runs into a Cadillac and ramps over it, the ramp becomes visible.