An employee was making adjustments on a flag indicator for a block unloader machine. The employee had climbed up onto a 12-foot-high block rack to access the flags and make the adjustments. The employee placed his right hand on the track as the unloader returned to gather another row of palletized bricks. The unloader then crushed his fingers, resulting in broken bones, cuts, and severed tendons in the right index finger, as well as cuts and a partially severed tendon to the right middle finger.