In the scene just before Burton hits the boy we see Vicki sitting bare feet in the car. In the next scene Vicki opens the door to run to the injured boy having her shoes on. To put on the shoes would be impossible that fast especially because Vicki's shoes have to be tied up.
When Burton is attempting to tune in a station on his stock AM radio, a station comes in loud and clear with the creepy broadcast. He looks out the window and the view is of - not a longwire AM antenna system, but rather a tower with FM repeaters.