Abstract: At approximately 1:00 p.m. on November 26, 2003, Employee #1, a painter, was painting a warehouse at a construction site using an aerial lift. A coworker, who was not trained in the use of the aerial lift, was helping. The aerial lift was blocking a driveway and the superintendent of the general contractor asked the coworker to clear the way while Employee #1 went to the other side the building. Employee #1 yelled at his coworker not to operate the aerial lift as he was walking toward the aerial lift. Employee #1 was putting on a harness to move the aerial lift, but the coworker moved the aerial-lift basket, which struck Employee #1, pushing him against a sprinkler shutoff valve on the wall. Employee #1 was hospitalized with internal injuries.