EE AND OTHER HAD COMPLETED A JOB BEHIND THE 5/6 BURNING BLDG. AND PUT THEIR TOOLS AND SUPPLIES INT HE BED OF THE 1993 CHEVY PICK UP, INORDER TO RETURN TO THE NORTH SHOP PRIOR TO GOING HOME AT THE END OF THE DAY SHIFT. EE REACHED WITH BOTH HANDS AND CLOSED THE OPEN TAILGATE HARD. HIS LEFT HAND FIFTH FINGER GOT CAUGHT BETWEEN THE GATE AND LEFT SIDE TOOL BOX MOUNTED ON THE BED CAUSIN