I was playing a training game, and in round 9, I misplaced a MULE, which ran off. I went back in the store, went into the chorale to buy a new one, and my turn ended. The sound of my walking character continued though, through the 3 AI turns, and production, and only stopped when I had to walk again during an auction. I got production as normal, but missed the chance entirely to place any MULES in plots. (So that was annoying.)
Game Link:
http://www.planetmule.com/hi-score-game/game?game_id=16269