while pulling onto i83 i pushed down on the gas pedal to quickly accelerate to merge. the pedal became stuck on the floor mat sticking it in the down position causing the truck to rapidly accelerate after i left my foot off the gas pedal. i had to use my feet to pull the floor mat back towards the seat to release the gas pedal. this has happened several times over the last few years, most recently november 20, 2012. *tr