An employee was preparing to place extruded wire onto a take-up reel using a "mule rope" affixed to the start end of the wire and had tied the other end of the mule rope to the take-up reel. The employee was using their left hand to hold the mule rope in place on the end of the wire. While the employee was jogging the reel to take the slack out of the mule rope, the mule rope tightened and pinched the employee's left index fingertip. The employee sustained an amputation of the fingertip.