The House of Commons Speaker made an extraordinary intervention today abruptly cutting off one of Labour's most senior woman as she laid into the Tories' chaotic handling of Brexit .
Emily Thornberry, who was standing in for Jeremy Corbyn, was in full flow as she delivered a devastating verdict on the state of the government's negotiations.
She told the House of Commons: "We have ended up with them proposing a dog's Brexit which will satisfy no one, which will not fly in Europe, which will waste the next few weeks and will... "
The Speaker John Bercow interrupted Ms Thornberry calling for the government to respond - but the shadow foreign secretary glared at him from the despatch box.
Because the Prime Minister was in Brussels for the NATO summit, he de facto deputy David Lidington took the Parliamentary jousting match in her place.
Shadow foreign secretary Emily Thornberry was standing in for Jeremy Corbyn on Labour's side.
The former barrister was leading a detailed and targeted attack on the government chaos in the wake of their hastily hammered out customs Brexit compromise.
But John Bercow decided that the chamber had had enough of her final question and cut her off.
It was an extraordinary move from the speaker who never stops Jeremy Corbyn - despite some long-winded contributions from the Leader of the Opposition in the weekly exchange.
It was also an odd move considering Mr Bercow has a track record of standing up for Ms Thornberry when she is being shouted down in the chamber.
But he also interrupted the Green Party leader Caroline Lucas before she had finished asking her question.