When I was parking my car on the street, in front of my house, my Chevy Bolt suddenly accelerated. Like it was full throttle. I slammed the brake pedal, didn't help. My Bolt pushed forward, then to the sidewalk, my parked 4000lbs van, that was in front of me (van had front wheels turned/pointing to the curb). My bolt continued accelerating for another few seconds, even that I was pressing brake pedal as hard as I could. I released and pressed brake pedal at least once or twice. Eventually my car stopped. Whole ordeal lasted just a few seconds. I turned the car off. After a minute, I turned the car on again, very carefully. It behaved normally. Throttle and brakes behaved like always. I parked it and will have it towed to the diagnostic or service place. Both my Chevy Bolt and my van (Dodge ram 1500 van 2003) sustained significant damage.