A game for the ages, but a couple of rules questions you ,who are more learned ,can help me with......
(1) Horsecollar flag on KC, but the runner (SF's QB) didn't go down. was that part of the "Don't breathe on the QB"rule ?
(2) IG flag on KC, enforced 10 from previous spot & LOD, isn't that a spot foul in NFL ?
(3) In a couple of push/shove/whatever situations, officials with black jackets came onto the field to restore peace. Were they chain crew, alternates or what ?