From the sideline, someone suggested to Murphy that perhaps Young had "slipped in the mud".
Bush: "Murph said, 'Fair enough, that looks okay to me,' and they moved on.
"These were the days when the players sorted these things out themselves. They weren't thugs or vicious but if you stepped outside the great unwritten rules you could expect comeuppance."
The dramatic picture of Young comes from a collection of more than 100 mounted photographs, mostly black and white, selected from Bush's vast catalogue. They feature in a show, Hard on the Heels, which opens at the Viaduct today.
Essentially it is a history of the game seen through an All Black lens over the second half of the 20th century when Bush, who is nearly 81, had few, if any, peers. He is with the team at home, and away, in Britain, Europe, Australia and South Africa, on and off the paddock.
Games were played in the afternoon. "I tell people we were favoured with a magic ingredient," says Bush from his Wellington home.
"They ask me if it was a a secret lens or something. No, I say, it's an old-fashioned thing called daylight."
Hard on the Heels opens today from noon at the BackingBlack HQ on Customs St West in the Viaduct Basin.