"I got that from my mum - I've always liked to dance and I'm probably a little bit better when I've got a couple in me, to be fair," Robertson said. "It sort of happened back when I was playing - we had a couple trips to Bermuda with the Classic All Blacks and I had a bit of a routine that alternated every other night.
"And that sort of carried on. The 'hoo hey Razor Ray' chant was probably started by myself and a couple of boys I played with over in Bermuda brought it back to New Zealand."
That chant is sung by the players who encircle Robertson at the middle of the pitch, providing a soundtrack for an impressive array of moves.
"I have some staple moves, but that might grow down the track," the 42-year-old laughed. "Luckily I'm flexible - to get from a windmill to a backspin is pretty good.
"You just get into the moment and freestyle, and what comes out comes out. It was a pretty big moment and I was more than happy to do anything after an occasion like that."
That occasion - the Crusaders' eighth Super Rugby title - continued in some style the next day, with Robertson and the players celebrating in South Africa before heading home to begin the recovery.
"I hit the wall on Wednesday and I think I've just climbed over it today," he said. "Fortunately we had a whole day in South Africa, probably mid-20 degrees and outside by the pool at the hotel. That was some afternoon. A lack of sleep, dehydrated and no food was probably the worst preparation ever for getting on the plane, but I wouldn't have changed it. It was a great day."
As for the best performer off the pitch, Robertson nominated a player who also made his impact felt on the field all season long.
"Israel Dagg loves it - he's a champion. That's probably when he does some of his best work, post-campaign and he's a really caring bloke so he makes sure everyone's having a good time."
