Danny Finkelstein has an excellent spot here noting the difference between Brown and Cameron in the BBC cutaways at the moment Michael Martin was talking about "leadership" in his final speech in the Commons.
Whatever one thinks of Michael Martin, Brown's disrespectful approach reveals quite a lot about what he really thinks on the matter of expenses and the importance of Parliament. Technically known as the "I don't give a shit" pose I believe.
Bring back Blair huh? At least he had a sense of decorum unlike the odious Brown.
Screen grabs from the BBC