Well, if we assume that the werewolf is consensually and tenderly embracing you from behind, with it's long lengthy paws wrapped protectively around your upper body with a firmness that makes you feel safe and steadfastly locking your upper body in place. The impressive rock hard dick is inside of you completely to the base, with the knot included, thus steadily anchoring your lower body as well.

You probably won't be flying through the windscreen on a collision. This has been my scientific analysis, I won't be taking any questions.