I've had this problem for awhile (if you want to call it a problem)... but anytime someone pounds on the table and I have my 12' iBook just chilling on it, it makes a resetting noise, a very mechanical sound that makes it seem like it's resetting itself once. I have no idea why, and I just beg people around me to regulate their anger. However, even when I am picking up my iBook it'll make the noise. Is this a sign of a deteorating cd-rom drive? Or are most iBooks and Apple laptops like this?