Sudden and without any warning, complete catastrophic brake failure while stopped attempting to pay at the pay station to exit a parking garage. My truck was fully stopped, in drive with my foot on the footbrake pedal, and started moving forward and suddenly lurched thru the parking exit gate and damaging it and the front end of my truck. Fortunately, no one was crossing on the sidewalk in front my truck or they would have been injured or worse, or we would have T-boned by oncoming traffic on the street. There was brake fluid in several areas where I parked the vehicle on the street after moving from the parking garage. There was a