WHILE APPLYING URGENT BRAKING AT FULL PEDAL FORCE DUE TO ANOTHER VEHICLE CHANGING LANES IN FRONT OF THE VEHICLE AT A MUCH LOWER SPEED, THE ABS SYSTEM FAILED TO FUNCTION, CAUSING THE VEHICLE TO SKID FOR TWO TO THREE SECONDS OVER AN UNKNOWN DISTANCE. AFTER APPROXIMATELY TWO TO THREE SECONDS APPLYING FULL FORCE TO THE BRAKE PEDAL AND SKIDDING, THE PEDAL SUDDENLY RELEASED ALL RESISTANCE AGAINST THE DRIVER'S FOOT AND WAS ABLE TO BECOME FULLY-DEPRESSED AGAINST THE FLOORBOARD/FIREWALL OF THE VEHICLE. AT THE MOMENT OF THE EVENT, THE VEHICLE GAVE A VIOLENT SHUDDER AND ALL BRAKING POWER WAS LOST. THE VEHICLE CONTINUED FORWARD WITHOUT BRAKES UNTIL STRIKING ANOTHER VEHICLE AND COMING TO A FULL STOP, RESULTING IN MULTIPLE INJURIES AND A TOTAL LOSS OF THE VEHICLE. POST-COLLISION, THE VEHICLE'S BRAKE PEDAL WAS ABLE TO BE PRESSED COMPLETELY TO THE FLOORBOARD/FIREWALL OF THE VEHICLE WITH VERY LITTLE RESISTANCE. THE APPROXIMATE SPEED WHEN BRAKING WAS INITIATED WAS BETWEEN 45 AND 50 MILES PER HOUR. POLICE RESPONDING TO THE COLLISION ESTIMATED THAT THE VEHICLE WAS TRAVELING AT APPROXIMATELY 15 MILES PER HOUR AT THE FINAL POINT OF COLLISION WITH THE SECOND VEHICLE INVOLVED ACCORDING TO THE POLICE REPORT. *JS