As an employee was mounting an end-dump, he lost his footing and gripped the handrails tighter to secure his position on the ladder. In doing so, he felt a ""pop"" near his right elbow. Although he did not fall off the ladder, he suffered a ruptured tendon of the right triceps. The conditions were muddy at the time. He had surgery on 12/28/05 which was his first day missed.