little cloud of smoke/dust

I thought the same thing, but I justified it saying to myself that it could be the air being compressed under the van, but I still couldn't believe that.

Now I'm looking at the position of the rear tire in the three frames before it enters the van. This has to be retouched. The rear tire seems too low to make it into the van three frames out. Miracously the tire gains about 6-8 inches of vertical position in the very next frame. But the guy did a good job.