Just been watching a replay of the last 2 laps of Mo Farah's 10,000m race in Beijing on the BBC website, and I was interested by the way in which lapped runners refused to move into an outer lane in order to allow the leading runners from passing inside them. As Brendan Foster said in commentary, that has always been racetrack etiquette (and not just in athletics), but seem to be being lost nowadays. The result, as far as I could see, was that Mo was twice clipped from behind as he moved out to overtake someone he was lapping.