Abstract: At 1:30 p.m. on March 9, 2019, Employee #1, employed by a drywall contractor, was doing interior work in a unit of a multifamily residential building. He was in the process of mudding drywall on an interior closet. While holding a tray of mud in his hand, the employee attempted to climb a 4-foot rolling scaffold to reach the top portion of the closet area without first locking the scaffold's wheels. As the employee attempted to step onto the bottom step of the scaffold, the scaffold rolled out from under him, causing him to fall back and hit his head on the concrete floor, a fall height of approximately 2 feet. The employee was transported to the hospital, where he was admitted for treatment of a head concussion.