The significance of Kieran Read leaving the field after 30 minutes on Saturday night was easy to understand in the context of the match between the Chiefs and Crusaders.
Not so easy to appreciate was the significance of his departure in a much wider context - that of the game's ongoing battle to improve management and appreciation of the seriousness of head knocks.
The epic encounter in Hamilton was as much a victory for the sideline concussion test as it was for the Crusaders. As much as it showcased the bravery, commitment and passion of the respective players, it also highlighted the compassion and morality of the respective coaching teams.
Actions haven't always supported words when it comes to the management of players with head knocks, but on Saturday both coaching teams made decisions that illustrated their conviction there are no shades of grey when it comes to concussion. Read took a swinging arm to the jaw late in the first half. He was clearly dazed yet reluctant to come off.