As discussed in that thread, apparently this mostly happens to “2-foot drivers,” people who use one foot for the gas and one for the brakes. When in a state of panic or surprise, they can accidentally mix up which foot they need to stomp down on and end up slamming down the accelerator instead of the brakes.
I know some countries have very....."easy going" attitude to drivers ed, but surely.....especially if most of your vehicles are automatic.....you must have been told that your left foot never leaves the floor or you're going to seriously hurt yourself, right???
I and everyone I know around my age was taught to only use the right foot for both brake and gas, but apparently it was relatively common in the 1960s or so for drivers (at least of automatic transmissions) to be taught the 2-foot "method". I have nothing to back that up other than anecdotes on the Internet, though.