Back in the old days when we had carburetors under our car hoods, a broken motor mount (nearly always on the driver's side of the engine), the carb/throttle linkage would/could get stuck, causing the gas pedal to get stuck, with the pedal not coming back up even when you took your foot off of it. Not a good thing. I speak from experience.
When I was a teenager, I had a '67 Ford Custom 500. That was my first car. It had no AC, no power steering or brakes, no automatic transmission (had 3 on the tree), no radio....had basically just an engine, seats & a steering wheel...lol. Being a typical teenage boy, I drove the crap outta it. I was constantly revving the engine (289 v-8) & dumping the clutch, so I could burn the tires off at a premature rate. Of course I didn't care about that, because....I was a dumb teenage boy.
All that clutch abuse caused my driver's side motor mount to break. The reason being that the engine naturally torques from one side to the other when it's revved....lifting up on one side, trying to rotate to the other side. Anyhow...it broke the motor mount.
Being the inventive, yet poor teenager I was, I had previously purchased & installed a classy chrome barefoot-shaped gas pedal for my cool car. It looked like a foot, including toes. After my motor mount broke, I could only drive my car barefoot, so I could use my big toe to grasp the backside of the gas pedal & pull it back out when I needed to shift gears. I got pretty good at this technique, & continued to drive this way for a few months. No big deal. I don't remember there being any safety inspections back in those days....