Mahlon Pitney, Southern Railway Company v. Puckett…
“ The court held that although plaintiff's primary object may have been to rescue his fellow employee, his act nevertheless was the first step in clearing the obstruction from the tracks, to the end that the remaining cars for train No. 75 might be hauled over them; that his work facilitated interstate transportation on the railroad, and that consequently he was engaged in interstate commerce when injured. ”
