I WAS DRIVING MY 2010 EDGE IN STOP AND GO TRAFFIC. THE CARS IN FRONT OF ME STOPED SUDDENLY SO I SLAMMED ON MY BRAKES. MY BRAKE PEDAL WENT ALL THE WAY TO THE FLOOR WITHOUT STOPPING MY VEHICLE. ( ALL OF THIS IS HAPPENING IN SECONDS TRAVELING ABOUT TWO TO THREE CAR LENGTHS)I RELEASED MY FOOT AND THE BRAKE PEDAL RETURNED TO A NORMAL POSITION. I PRESSED THE BRAKES AGAIN AND THE PEDAL TRAVELED ALL THE WAY TO THE FLOORBOARD AGAIN WITHOUT STOPPING MY VEHICLE. I RELEASED PRESSURE AGAIN AND THIS TIME THE PEDAL SHOT BACK HITTING MY FOOT WITH SUCH FORCE THAT IT CAUSED A LISFRANC DISLOCATION AND SEVERE BONE BRUISING TO MY RIGHT FOOT. (I LOST MY JOB AND WILL BE UNABLE TO WORK FOR AT LEAST SIX MONTHS, IF I AM ABLE TO REGAIN FULL FUNCTION DUE TO THIS ACCIDENT .)THROUGH THE PAIN I DEPRESSED THE BRAKES A THIRD TIME AND THEY WENT TO THE FLOOR AGAIN, NOT STOPPING MY VEHICLE AND RESULTING IN MY VEHICLE CRASHING INTO THE VEHICLE IN FRONT OF ME AT A RELATIVELY SLOW SPEED. THE AIRBAGS DID NOT DEPLOY.