On smaller aircraft, this is standard operating procedure. The Norwegian regional carrier Widerøe (Whose slogan might well have been "We proudly fly where ever

On smaller aircraft, this is standard operating procedure. The Norwegian regional carrier Widerøe (Whose slogan might well have been "We proudly fly where everyone else is scared s--tless to!", operating a fleet of small to mid-size aircraft always play a game of musical chairs in their smaller (<40pax or so) planes prior to takeoff. Edit: Ninja'd by gragas.