my dad works for meguiars a car wax company and, he goes to a lot of auto shows all over america and so I see stuff from low riders to armored beasts like this
The truck is moving, the photographer will have panned - moved with the car while taking the picture, in order to make the foreground blurred... may have also used a slower shutter speed to intensify the movement.
or the easier route would be shooting while driving same speed next to them, at least easier for the photographer. think of the side roads next to an interstate. props to photog if he shot it while standing.