Abstract: Employee #1, of Construction Sheetrock Work, was repairing holes in an interior sheetrock wall and preparing to install new sheetrock at a small industrial complex. He climbed an approximately 14 1/2 ft tall aluminum extension ladder to trim ragged hole edges in the sheetrock. The ladder slipped and Employee #1 fell onto the concrete floor, fracturing his left ankle and right heel. He was using an unknown brand of extension ladder that he had taken from a "pile of ladders" lying next to the work area. It was damaged and had no safety feet, nor was it blocked or tied off to prevent displacement. The employer had provided an extension ladder in good condition, which Employee #1 had on his truck at the time of the accident.