I was at a complete stop awaiting a draw bridge to lower. I put my vehicle in park. When the cars In front of me started to move I put my foot on the brake and turned the knob to drive. My vehicle immediately accelerated out of control. I immediately pressed both feet on the brake as hard as I could and the vehicle kept moving. I hit a guy on a motorcycle and swerved left as hard as I could. I traveled another 150-200 feet and was quickly approaching a gate at a local factory when my vehicle stopped three feet in front of the gate. I thought I killed the guy on the motorcycle- luckily he was ok. The witness behind me described the incident exactly as I did too. I contacted Daimler Chrysler and opened up a case with them. Seems like the gas pedal was pressing itself and I could over power it.