While in the staging lanes for NMCA True Street in our 2015 Mustang we were positioned behind a black Corvette, cars started to move forward, we pressed the gas pedal, it got stuck part throttle by the floor mat, we lunged forward striking the black Corvette, he then struck other cars and we hit a red Pontiac. This was an unfortunate accident and thankfully no one was hurt. We are contacting all of the drivers involved to address getting their cars repaired.