"I expect to go to the palace and offer my resignation so we will have a new prime minister in that building behind me by Wednesday evening," he said, referring to Buckingham Palace.
He then stepped away from reporters, evidently not aware his microphone was still on. There doesn't appear to be a huge weight on Cameron's shoulders as he heads out of office.
While some suggest that the tune, which Cameron ended by voicing a resounding "right," belonged to "The West Wing," others offer that the melody was a part of Elmer Bernstein's "The Great Escape" theme. Naturally, there is a thorough musical analysis.