Could the downvoter answer the question? In none of the cars I've driven does the "brake always override the throttle". Yes, brake is more powerful than the the engine, but that is hardly "overriding" in the sense that I understand it.
The "stop" signal of the brakes outweighs/overrides the "go" signal of the throttle by some low multiple. If I had to guess, the brakes on an average car can consume 3-4 times as much horsespower as the engine produces. Porsche used to describe some of their brakes as "2000 hp brakes".