While getting on Oppressor MKII, hold (RT on Xbox, R1 on PS, and W on PC) and continuously spam (RB on Xbox, R1 on PS, and Space Bar on PC) and (A on Xbox, Square on PS, and X on PC) while (holding back the analog stick on Xbox and PS and S on PC) and your Oppressor will be launched upward.

There are probably a few different situations where this would be helpful (i.e. when there is a building/cars/obstacles in front of you).