Re: If a plane can do this, what happens to cars?
It wasn't just Toyota that had the stuck throttle problem. Some GM vehicles had it, too. I know, because it happened on the 1986 Chevy Blazer I owned. The first time it happened, it scared me significantly. Fortunately, I had a long stretch of clear roadway ahead, which gave me time to diagnose the issue and come up with a solution. The solution to the problem was to just tap the accelerator pedal and release it quickly (well, at least on that GM vehicle). I got to the point where I could reproduce it at will. But, had I been the captain of a passenger jetliner, with a dozen other warnings going off, with some automated systems trying to assume control, and with the ocean fast approaching, I'm not sure I could have found a solution.
P.S. After that first incident, I did need a beer, or two.