To burnout in a rear wheel drive vehicle the driver usually has to press the gas and brake pedals at the same time.  The brake pedal will require modulation The goal is to allow the rear tires to spin while holding the car in place with the front wheels remaining motionless. At a certain point of balance, the front brakes will prevent the car from moving forward while the rear brakes will have insufficient grip to keep the wheels from spinning, because engine power is transferred to the rear wheels only.