EE WAS UNLOADING AN OXYGEN CYLINDER FROM THE BUCKET OF A SKID LOADER ONTO A TRUCK. THE SKID LOADER HAD BACKED UP, BUT THEN PULLED FORWARD AGAIN WHEN THE OPERATOR SAW THAT THE EE AND CYLINDER WERE ABOUT TO FALL. EE'S LEG GOT CAUGHT BETWEEN THE SKID LOADER BUCKET AND THE TRUCK.