When he spoke, Brownlee devoted little effort to countering Twyford apart from saying he would have thought the Labour MP would have realised that "every loop has a u-turn in it".
Twyford's exposure of National's plan helped deflect some of National's otherwise unadulterated glee at the slump in both Labour's and David Shearer's ratings in the latest Herald-DigiPoll survey. The poll had provided the cue for National's Chris Finlayson to warn Shearer to watch both his front and back.
The former did so via a history lecture during the debate on the subject of loyalty and treachery in the Labour Party.
The Cabinet minister described the Labour Party as being like "some kind of macabre Byzantine dance of killers" who habitually plotted to get rid of the incumbent leader simply so they could turn on the next one.
Finlayson said Shearer was "a very nice guy and a good and decent man" who had done a lot of good in his work overseas with international agencies like the United Nations.
"But none of his dealings with central African dictatorships or Balkan civil wars could have prepared him for the leadership of the Labour Party," said Finlayson somewhat sarcastically, provoking laughter from applauding National colleagues.
Twyford got the last laugh, however, noting that Brownlee had only days earlier dismissed the city rail link as "a short, little loop".
Added Twyford: "I wondered in fact if he was talking about Mr Finlayson."
Debate on this article is now closed.