Disassembling a Hard Drive

Last week at work, a friend and I disassembled an old computer HD which had died. Neither of us had ever seen the inside of a hard drive before (except in pictures), so we figured it would be a good opportunity to check it out. A few screws and a bit of prying removed the cover to expose the inner workings.
A few moments later, various pieces were out of the case and lying on my desk. We were probably most surprised by the incredible polish on the actual disk, which seemed to be more reflective than a mirror!