feet weren't on the gas pedal. >> reporter: he says the car jumped from 50 to 70 seemingly on his own and he was starting to panic. >> i believe i pushed the stop button to get the car to stop. i can even push it now and the car is still running. it's not -- it's not stopping. >> reporter: like many new modales the avalon has no key, instead a push button turns the car on and off. grifny had not read the lengthy manual cover to cover and had no idea in an emergency, the only way to stop the car is to pull down the ignition for three seconds. >> was it surprising? >> what was surprising was to be totally feeling you're out of control. >> he says it was a safety feature to shut off accidental while driving. feature may not be well