During training, Miner was at top of training scaffolding stairway. Miner's L foot slipped while egressing stairway, R foot stayed in place. Miner's L hand was on handrail & kept Miner from falling to ground. Initially was 1st aid, but pain continued. Miner didn't go to clinic till 11/02/24, was diagnosed w/Rt fibula fracture. Miner is on restrictions, has missed no scheduled work