In preparation for lifting an HVAC unit to the top of a school building, the victim and an assistant attempted to put the telescoping boom of a crane into the hoisting mode. When the boom failed to move, the victim called the office for. The company notified an electrician and told the victim and helper to wait.
The helper dismounted and was walking away from the crane when he heard the victim shout. While attempting to climb down from the deck of the crane, the victim apparently stumbled and fell 5 feet, head first, to the pavement.