Unintended Acceleration While at a standstill , on a hill, holding a foot on the break pedal , I lifted my foot from the break pedal to drift forward down the hill, (without ever getting near the gas pedal ) The car accelerated at a very high RPM. I pressed down on the break pedal to stop the car, but it was at such a high RPM rate that I was unable to stop the vehicle from hitting another vehicle in front of me, caroming off of it and my vehicle landed atop a hugh shrub suspending it several feet in the air. My vehicle was totaled and the vehicle it hit was severely damaged. There were no serious bodily injuries to any passengers in either vehicle. There are two issues here. The unintented acceleration, and the inability of the breaks to stop the vehicle.