Hi, I'm having this problem with the new macbook pro 15'. Sometimes when watching a movie with higher volume set I can hear the hdd 'parking' (Sudden motion sensor triggering) and the video would stop for a moment. It's very annoying and I'm not sure if its normal for it to be so sensitive? My HDD is Hitachi 500MB. It doesn't happen very often, but sometimes it does and I dont think that just loud volume should cause hdd to park... Can anyone help me, share your thoughts? Thank you in advance.