The EE was coming down from SC43, un-chocking it, EE's feet slipped out from under the shaft causing EE to remain standing in an awkward standing position straining left hip and upper leg. EE reported on 8/27 and was evaluated by company Doctor. Doctor gave EE full duty RTW. EE scheduled their own Dr visit on 8/30, WC ended up taking it. First day missed 8/31/21.