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.
Remember, that bike is traveling at perhaps 30 feet per second when the front wheel touches down. The front wheel is inside the van, the rear wheel is below the level of the van floor just about to hit the rear bumper of the van. What happens in the next 1/25th of a second (next frame)? The rear wheel hits and compresses the bike's suspension (there's probably 12-15" of suspension travel in that thing) and forward momentum of the bike carries it in.
Remember, all you're seeing are snapshots, taken 1/25 of a second apart, with as much as 15 inches of horizontal travel between shots.
tanstaafl.
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"There Ain't No Such Thing As A Free Lunch"