If the accelerator pedal becomes mechanically stuck down (unintended continuous acceleration), what is the safest and most effective immediate response?

1. Turn the ignition key all the way to 'LOCK' while traveling at 100 km/h
2. Shift the transmission into NEUTRAL (N), firmly and continuously apply the foot brake, steer to the shoulder, and turn off the engine once stopped safely (挂空挡、踩刹车、靠边停车)
3. Pump the steering wheel back and forth to slow the car down
4. Unbuckle seat belt and jump into the rear seat