An employee was using a forklift to dump a hopper into a dumpster. The employee used his left hand to pull the lever on the hopper to release the materials into the dumpster while placing his right hand on the forks of the forklift. When the employee pulled the lever, the hopper jolted back and struck the employee's right hand, crushing his fingertips. The employee suffered amputation of the right index and middle fingertips.