The issue with the Delorean was a bit more complex than the accelerator pedal slipping off, sliding forward and locking at full throttle:

It was discovered that rain water would run into the cable sheath due to the openings in the engine cover, and collect at the lowest point of the jacket and freeze there when the temperature dropped.

If you happen to have this happen, you'll note that you can't press the throttle pedal without a lot of effort. If you insist and press harder, you will either bend the throttle linkage or pull the cable through the ice and then it will lock at something more than the normal idle speed, often full throttle! In this event you will need to thaw out the frozen cable. This can be done by either parking the car in a warm garage, waiting for spring, or (assuming you have not jammed the throttle open) allowing the engine to idle with the heat on full and the doors closed, for as much as an hour. The frozen part of the cable is actually inside the console area of the car and will thaw out if the car interior is warm.