She called Boris Johnson a habitual liar, and he is.
She did it at the end of a session in parliament and was booted out for a day. Big deal.
It's been a crap week for the wretched Tory government. Cummings, the ping chaos, the ill-judged attack on Marcus Rashford, a terribly delivered speech by Johnson on levelling up, and the drip drip of buffoonery and lies from Johnson just keeps coming.
All that Dawn Butler did was channel the content of a widely circulated video by Peter Stefanovic which details all the times Johnson lies. He does it without thinking, it's always about the moment, how to wriggle out of a corner until the next embarrassing encounter.
I know this is going to sound monstrously patronising, but what she did is the best of the left of the Labour Party. They are protestors, they are populists who play to the gallery, they are unsubtle. Good. Use that energy. I don't think she should be anywhere the leadership of a serious political movement, but for this disheartened and fed up Centrist Dad it was so good to see.