I don't know if anyone else has had this problem, but when I'm playing one of my save files, my controller continues to vibrate off and on (about every 30 sec) as if there were a dragon or something nearby. It only does it during gameplay (not on any of the menus) and only does it on this save file. I've tried turning the system off and on, and pressing the reset button on the controller, but nothing works. Anybody know what I can do to stop it, aside from turning off the vibrate function?