He did it in previous PMQs and the leadership election too I think. Truss turned out to be all those supposed 'fears' realised (out of control leader, fairytale policies, damaging the reputation of UK etc.) and she was heralded by many in his own current cabinet. Laughable.
With “but Corbyn”, Rishi Sunk came up with a real zinger at PMQs. And that was the highlight of his performance.
Truss lasted 45 days. Is Sunak entering “hold my beer” territory? We can but hope