Newcastle Knights rugby league coach Nathan Brown is the latest to benefit from being immersed with the All Blacks as they prepare for their test against the Springboks.
The All Blacks often invite leading coaches to observe the way they do things in the hope that they themselves can gain knowledge in return and this week it's Brown's turn.
In the past, former Manchester United player and Ireland coach Roy Keane, New South Wales rugby league coach Laurie Daley, former Kiwis coach David Kidwell and Melbourne Storm coach Craig Bellamy have observed the All Blacks.
"They were keen to come and it's interesting to see what they see and then you have some conversations about the similarities and differences," All Blacks assistant coach Ian Foster said. "If there's one little gold nugget there for us at the end of the week, that'll be really good for us."
"It's just part of us being exposed to different ideas and a different set of eyes and we don't really know what's going to come out of it," said Foster of the visits.