Re: Scram button, revisited.
I usually have a kill switch and fire suppression within arms reach, too. Prudent. The switch itself isn't protected by a molly-guard, but the arming switch for the fire suppression is.
Yes, just like the aircraft emergency power button, but often to the point of destroying the motor just as you cross the finish line. It can activate another level of nitrous (dry or wet), increase the redline (if you normally run a rev limiter), tell the wastegate to increase the boost, adjust the timing, or more usually some combination. It is normally only used in the semi finals or the finals because of the chances of doing internal damage to the engine.
Biting the hand that feeds IT
