I WAS TRAVELING ON AN INTERSTATE HIGHWAY WHEN I CAME UPON AN ACCIDENT INVOLVING MULTIPLE VEHICLES. I TOOK EVASIVE ACTION AND WAS ABLE TO STOP COMPLETELY AVOIDING THE VEHICLES INVOLVED, AND JUST BEHIND ONE VEHICLE THAT WAS PARTIALLY BLOCKING THE RIGHT LANE. I WAS STRUCK FROM BEHIND WHICH CAUSED THE DRIVERS SEAT TO GO INTO A RECLINING POSITION. MY TRUCK WAS PROPELLED FORWARD WITH ME IN A RECLINING POSITION. I FELT A SECONDARY IMPACT, WHICH DAMAGED THE FRONT OF MY VEHICLE. BECAUSE I WAS IN A RECLINING POSITION, I WAS UNABLE TO CONTROL OR DIRECT MY VEHICLE. NONE OF THE AIRBAGS IN MY VEHICLE DEPLOYED. I SOMEHOW PULLED MYSELF ERECT AND EVENTUALLY CAME TO A STOP ON THE INSIDE GRASSY MEDIAN OF THE HIGHWAY.