A haptic rig is a rig that emulates feelings, like in vr, you may touch something in vr and some servos make apply a bit of pressure so it feels like you are actually touching something. Leap motion is a 99$ thing to apply to any vr to make your hands the controllers. I need a motor that will not be damaged by free movement, like if you turn a servo without it being on, and that motor needs to be strong so it can stop me from moving to quickly, for example, to emulate swimming.