Abstract: At 2:00 p.m. on July 20, 2020, Employee #1 was installing test plugs in drains on the second level (Level 200) of a construction project. He then moved to the third level (Level 300) using a nearby extension ladder set up outside a barricaded area. While preparing to step off the ladder's fly section, the ladder dropped unexpectedly, causing the Safe-T ladder extension rails to detach. Employee #1 fell backwards, landing on his feet and then onto his back on the concrete deck. He sustained fractures to both ankles, both heels, and two vertebrae in his back. Emergency services transported him to the hospital, where he was admitted for treatment.