CAR ACCELERATING ON ITS OWN-WHAT COULD BE THE CAUSE? on 1999 Pontiac Bonneville

CAR ACCELERATED ON ITS OWN WHILE DRIVING AND WHILE I WAS IN A DRIVE THRU AND HAD THE BRAKE ON, WHAT COULD BE THE CAUSE?

Asked by for the 1999 Pontiac Bonneville
1 answer
Remove EVERYTHING from drivers floor area mats and all to see if that helps. Something is pressing on gas pedal!