Contingency plan for smoke? My one and only attended NFL game was at Kezar when I was a kid. Zeke Bratkowski was filling in for an injured Bart Starr. Maybe 1964. Don’t even remember who won the game. We were on the giant end zone. I do remember a bunch of seat cushions being thrown down to the field after the game. Must have been rentals.
And yes, have seen the Dirty Harry movie with the scene in Kezar with fog. Classic.