As you can see in the telemetry after a hard landing or jump the suspension on the hog may not rebound, which would make the truck very difficult to drive. In cross country races where the hog is expected to be on this would not be ideal as it would ruin your entire race. The Alumicraft Class 1 Buggy has the same issue, as highlighted here: Cars - Alumicraft #122 Class 1 Buggy - Suspension bottoms out and gets stuck