HIT HEAD ON BY TRUCK GOING APPROX. 45 MPH THAT SWERVED INTO MY CENTER TURN LANE. FRONT END DEMOLISHED - CAR WAS TOTALED - BUT AIR BAGS DID NOT DEPLOY. SEAT BELT DID NOT LOCK ON IMPACT. SIDE OF MY HEAD HIT DRIVER'S WINDOW OR FRAME - WAS CATAPULTED FORWARD AND CAUGHT IN SEAT BELT WHEN IT PULLED OUT ALL THE WAY, RESULTING IN HORRIFIC AND PAINFUL CHEST, ABDOMEN AND LEFT LEG INJURIES (SOFT TISSUE).