Albeit briefly, John Key lost the plot in Parliament yesterday. The Prime Minister could not remember the question Labour's David Cunliffe had asked him moments earlier. When Key recalled the relevant portfolio - "something to do with labour" - he started talking about completely different legislation to that to which Cunliffe had referred.
The Prime Minister has not lost his marbles. He was - in his words - having "just too much fun" at Labour's expense to worry about the subject matter of the questions.
Before going to the House, Key would have noted the three aspirants for the Labour leadership had each been given a question and accompanying follow-ups to put to a minister of their choice.
Two of the contenders, Cunliffe and Grant Robertson, took the only realistic option - targeting Key.
Shane Jones, Labour's spokesman on regional development, chose Steven Joyce, whose responsibilities include promoting economic growth in the regions.