After completing maintenance repairs above a finished product freezer, an employee was climbing down a self-supporting ladder to clean up the work area. The ladder shifted forward and caused the employee to lose balance and lean back against a wall. The shift in weight then caused the ladder to shift even further forward, away from the employee, and the employee fell an estimated 6 feet to the concrete floor below. The employee braced for the fall by reaching out his left arm and landed on his elbow. The elbow was fractured.