I HAVE A 2007 PRIUS. THE CAR WAS INVOLVED IN AN ACCIDENT ON AUGUST 30, 2013 BECAUSE "NO BRAKE". IT WAS IN A STOP AND GO SITUATION TRAVELING AT ABOUT 20 MILES PER HOUR. THE CAR IN FRONT STOPPED, I SLAMMED ON THE BRAKE AND TOTAL BRAKE FAILURE. MY 16 YEARS OLD SON SITTING IN THE CAR OBSERVED THE "NO BRAKE" SCENARIO. THERE WAS A 25 POUND OF RICE IN THE TRUCK DID NOT EVEN MOVE. NO SKIP MARK... NOTHING. TOOK MY CAR TO LONGO TOYOTA AND FOUND NOTHING WITH THE BRAKE SYSTEM, OTHER THAN THE FRONT PAD WAS THIN, TIRES WERE MARGINAL ETC. NONE OF THE FINDINGS EXPLAINED THE NO BRAKE SCENARIO. FOR SOME REASON I CANNOT MAKE THIS NO BRAKE TO APPEAR AGAIN. I WANT PEOPLE TO AWARE OF THIS AND GATHER INFORMATION. IT APPEARS TO ME THE PRIUS CANNOT RESPONSE TO A QUICK STOP AT SLOW SPEED. SOMEHOW, THE CAR TAKES MORE THAN A SECOND FOR THE BRAKING TO KICK IN - THE REACTION DOES NOT APPEAR TO BE INSTANTANEOUS. AND IF YOU ARE TOO CLOSE, THAT EXTRA ONE SECOND WAIT WILL CAUSE A COLLISION.