Upon arriving at my condo after work, pulled into the driveway that goes to 2nd floor underground. Had my foot on the brake and when the garage door started to rise, I put foot on gas pedal to inch forward and the gas pedal went all the way down. Braking did not stop the car. The car crashed through the garage door but that did not stop car. It continued till the car hit a cement boulder which finally stopped it. After car hit the cement boulder it continued to try and run. Obviously a huge risk factor when your car accelerates and can't be stopped. If that had happened on the street, I can't even imagine what could have happened. The car was totaled so I doubt if it has been checked by anyone. And there was no warning at all. Had not noticed anything unusual that give me any hint that the gas pedal would stick all the to the floor. When I researched unexplained acceleration there was reference to the throttle and 4 or 5 reasons why it would accelerate on its own.