WAS DRIVING ABOUT 35 MPH IN RAINY WEATHER, RDS GREASY LIKE, STARTED APPLYING BRAKES; THEY LOCKED UP; VEHICLE SKIDDED; HIT ANOTHER VEHICLE. SEAT BELTS ON DRIVER'S/PASSENGER'S UNLOCKED. PASSENGER FLEW UNDER DASHBOARD; DRIVER HIT STEERING WHEEL W/CHEST. HAVE NOT TAKEN TO DEALER. *AK