Numerous Tesla owners say they've been trapped inside their EVs after they lost power.
(www.businessinsider.in)
The brakes in a Tesla are move powerful than the motors. If the guy in China had actually been hitting the brakes, the car could have never reached 150kmh. The chance of a simultaneous failure of the mechanical brakes, the electrical interlocks and the drive software is FAR less likely than the chance the driver was pushing the wrong peddle.