He called Seymour an "urban gravedigger" who's just "after a political corpse".
He went on to say it'd be "a long day in hell if he finds me." Never one to mince words.
The other grenade lobbed by Seymour this weekend was that Te Kura school, our national school of correspondence, spent $1.2 million on overseas travel including business class flights and five-star hotels over a five-year period.
Seymour called this a culture of extravagance and said in one report that, "no public servant needs to stay in a $400-a-night hotel room". He called them "out of control".
He's also been a very vocal critic of the Government's proposed Tomorrow's Schools reforms, organising a string of public meetings with parents, to actively encourage debate and engagement on the review.
I'm not sure if Seymour is making up for lost time from all those weeks spent in spandex last year on TV's Dancing with the Stars, but his bite and bark is making for good media fodder.
It's getting picked up, and it's generating headlines, attention and responses.
No matter what you think of Seymour, he's putting spotlights on stuff which rightly or wrongly calls for accountability.
Which is exactly what the leader of the opposition should be doing.
Which leads me to ask, Simon Bridges… where are you?