Safety fuel inertia shut off switch.

We had a tow truck guy get arrested for going around to parking lots like walmart and so on and he knew wher the switches where in the cars he would walk up and hit the side of the car with his fist then drive around the lot and wait for them to flag him down for help lol. Thats what made me think of hard launches trippin it but im not shure what kind of impact would be needed to set if off. To me they seam a lot like seat belts or airbags you hear about all the lives they save but rearly hear the down side, but at the same time this wont kill you if it dosnt work right just anoy the hekk out of you lol.