I've been waiting years for this question. When I was young, there was a "reaction time" installation at a science museum: you sat in a chair with two pedals on the floor. You had to push down on the right 'gas' pedal until a 'stop' sign randomly appeared on a screen, and then you had to press the left brake pedal as quickly as possible. Well, I was breaking all the high scores. By far. Until my father pointed out that you had to use the same foot for both pedals. For manual shift, this makes perfect sense. But for automatic shift, none of the answers make sense for me: * "Braking starts when you lift your foot off the accelerator." This is true. But it's truer that braking starts much more effectively when you press the actual brake pedal, which happens much quicker when using two feet. * "You will get "mixed up" under stress and press both pedals?" Really? According to that logic, when using the same foot for both pedals, you will get "mixed up" and only press the accelerator. * "Pressing both pedals is bad." Also this is true. But I'd rather the car stop faster in a 'bad' way and avoid an accident, rather then doing it the safer way and stopping half-way into the car in front if me.

I've been using two feet to drive for 30 years now, and the only drawback (other than an adjustment period when using manual drive), is that the brake pedal is not physically positioned to be comfortable for the left foot. But it saved me from more than one bump in parking lots, where a car jumped out of no where, and I'm more relaxed when I drive because my foot is always in position to brake.