The floor mats are specially designed to remain in position under your feet and out of reach of the accelerator pedal. The driver's side floor mat is held in place by two locator hooks and the passenger's side is held in place by one.
Be sure that the driver's side floor mat is properly placed on the floor so that it does not block the movement of the accelerator pedal.
To remove the floor mats, pull up on the rear of the mat to disconnect from the locator hooks.
To reinstall the floor mats, line up the openings in the floor mat over the locator hooks and push down into place.