Watching the Broncos-New England (Boston) throwback uniforms (both ugly although Denver had the ugliest uniforms ever) in the 50th anniversary of the first game in the AFL, one of the first things that happens in the first quarter is the referee goes to the replay tent to check a play challenge by Denver. If it's a true throwback game, why not do away with instant replay for the game. The refs didn't have that tool 50 years ago.