While crossing the rump and side walk to garage the car, as usual slowly proceed to enter the Garage but immediately the car went into extremely fast speed by itself and hit the side of the Garage, damaged the Garage wall, The garage opener, the cabinet, then hit the water softener and our other car in the front. It also smashed the bike against the wall , damaged the side wall cause a bulge to outside of the structure. The garage frame and right side of the Garage door fell on top of the car almost killed our daughter who was at the front passenger seat. The car brake did not stop the car, the alarm did not go off, the air bags did no inflate.