Was on a flight in to Houston Intercontinental about 9 months ago which aborted landing at the last second, because some idiot passenger got out of their seat (I presume a flight attendant called the flight deck). Anyway, after the second attempt when we were taxiing to the gate, the captain made an announcement that he was sorry for the delay we were about to experience, but due to the passenger action the plane would be boarded by federal marshalls. *Nobody* unbuckled their seat belt until they were told to on that flight ...