The injured employee had been placing pallet stringers (rough cut wood) into the hoppers for a nailing machine. The injured employee was removing a jammed piece of wood from a hopper while the operator of the nailing machine was also trying to unjam the wood. A metal bar moved and pinched the injured employee's finger against the jammed wood causing an avulsion injury to the fingernail and skin of the fingertip. The employee's finger required surgery that involved trimming the bone of the fingertip.