He probably caught sight of an arrowhead collector or rodeo clown in the car.
There are lots of possible explanations.
Perhaps the guy was on his way to delivering RAW MILK, for example.
Or maybe the driver was a plumber. Or a neurosurgeon. Or the DAD of a neurosurgeon. Or a dim-witted, youTube film-maker.
Or maybe a really sharp, conservative film-maker.
Lots of possibilities —more all the time, in fact.
maybe the driver was a RANCHER?