During a November 2015 game between the San Francisco 49ers and the St. Louis Rams at the Edward Jones Dome in St. Louis, 49ers’ running back Reggie Bush was pushed out of bounds in the direction of the stands.After regaining his balance, Bush tried to slow his momentum in order to avoid colliding with the wall and fan seating. Before reaching the wall, however, Bush slipped and fell on an uncovered portion of concrete that divided the turf field from the stands. The exposed concrete was about 15 yards from the edge …