Safety fuel inertia shut off switch.

I thought real hard about it after reading the story about the guy pulling into a car show while his family waited for him and watched him burn to death after he got plowed in the rear from a speeding car causing his fuel pump to keep running while he was knocked for a loop.

I personally don't race my car so not worried about killer hard launches although these switches don't activate unless you get punched with some substantial G-force which is much greater than launching at the track.