EE WAS A PASSENGER IN THE REAR COMPARTMENT OF A 5-TON MANTRIP. DRIVER & A FEDERAL INSPECTOR WEREIN THE FRONT COMPARTMENT. AT BREAK #6 ON 002-0 SECTION AN UNMANNED, RUN-A-WAY MANTRIP STRUCK THE 5-TON MANTRIP INJURED WAS RIDING IN. HE SUSTAINED A LACERATION WHEN HE WAS THROWN INTO THE CANOPY POST. STITCHES WERE REQUIRED TO CLOSE THE WOUND.