FRONT DRIVER FLOOR MAT INTERFERED WITH ACCELERATOR AND BRAKE CAUSING REAR END COLLISION IN BUMPER TO BUMPER TRAFFIC. I COULD NOT APPLY BRAKE BECAUSE FLOOR MAT HAD COME TO REST ON THE ACCELERATOR. UNAWARE OF THIS, WHEN CAR IN FRONT OF ME STOPPED, I APPLIED MY BRAKES AND MY CAR WOULD NOT STOP. I HAVE FRONT END DAMAGE. I DIDN'T KNOW WHAT WAS HAPPENING. I DISCOVERED THE MAT CORNER HAD COME TO REST ON THE ACCELERATOR. THE OTHER CAR WAS A GM YUKON AND DID NOT SUSTAIN DAMAGE. NOT KNOWING WHAT WAS WRONG AND AFRAID SOMETHING WOULD HAPPEN AGAIN WHILE DRIVING, I PULLED UP THE MAT, WHICH WAS CLIPPED DOWN AT BACK OF THE MAT NEAR THE DRIVER SEAT, DURING THE RIDE, AND THREW IT IN THE BACK SEAT. I AM TAKING MY CAR FOR AN ESTIMATED DAMAGE TOMORROW. LATER, OTHER PEOPLE TOLD ME THIS IS A COMMON PROBLEM!! I NEVER HEARD OF THIS BEFORE!!! SHOULD I REPORT THIS TO GM CHEVROLET DIV? I WAS SHOCKED AT THE TOTAL NON-CONTROL I HAD OF MY CAR WHEN THIS EPISODE HAPPENED, THANK GOD, I DID NOT DAMAGE THE OTHER VEHICLE. *TR