That happened to me once, well the brakes weren't turning off the cruise control and I was almost in town. Luckily I remembered the "Off" button. That's one way to scare yourself to death.
If I were a mechanic of some sort, I would figure out a way to override the cruise control, if I couldn't do that I'd keep going until I ran out of gas.
You accidentally slit a main artery at work (you're very clumsy) and no one is around because it's after hours. What do you do?
Avy & Sig credits go to Hurricane0