WE HAD LEASED THIS VEHICLE FROM HERTZ EARLIER IN THE DAY. THAT EVENING, I WAS DRIVING DOWN A HILL AND THE VEHICLE'S STEERING SYSTEM HAD SUDDENLY LOCKED UP. I WAS NOT ABLE TO STEER AND DROVE INTO A TREE AT A HIGH RATE OF SPEED. MY PASSENGER AND I BOTH SUFFERED SIGNIFICANT BODILY INJURIES AND WERE TAKEN TO A HOSPITAL VIA AMBULANCE.