Tonight I realised that you could actually disable that annoying *clank* sound when you move your MacBook Pro, that is Sudden Motion Sensor. The noise was very annoying for me if I had to move my MBP from my desk to my lap or something like that. Is there much of a risk of the hard drive getting damaged now that I have disable this? Would be great if Apple introduced a silent SMS, because to me, that noise is just like nails on a chalkboard. Is SMS useful or does it annoy you? (I hope I have helped a few people who didn't know what the noise was, aware of what it actually is, and have allowed you to disable it too).