Tonight I knocked my 12" PB off the armrest of the couch and it droped to the floor (≈20 inches) It was making a loud rythmic clicking noise, and it sounded like it was coming from the Harddrive (or at least that corner). I quickly poped out the battery and when I put it back in and re-booted it started clicking again for maybe 20 seconds. Then it stopped clicking and FSCKed. After another reboot everything seems to be fine. It runs good, no noise, no odd behaviour. I have Applecare. Should I send it in? Or did I dodge the bullet this time?