THE INJURED EE WAS ASSEMBLING A THREE PIECE RIM WHEN THE LOCK RING AND FLANGE BLEW OFF THE TIRE. THE EE INFLATED THE TIRE TO 15PSI AND WAS TADING ON THE LOCK RING TO MAKE SURE RETIRE WAS SEAKE R PROPERLY WHILE TAPING THE COCK RING IT CAME OFTHE TIRE STRIKING THE EE ON THE LEFT MIDDLE FINGER CAUSING LACERATION. THE EE REIEVED FOUR SUTURES.