KW, it's basic physics; if an impulse is applied off of the center of mass, the object will rotate in the direction of the impulse. In the case of INF Guy, it is a sharp impulse to the right shoulder, above and right of center mass. The center of mass will move backwards, away from the impulse with the right side moving away faster than the center, with the left side moving toward the impulse. As the center of mass moves back, INF Guy also pivots at the waste and leans back slightly. The result is the recoil will go up and to the right. As the traditional fighting stance has INF Guy leaning slightly forward, the upwardmovement is minimalised.