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Hard drives are more often than not taken for granted, and to be completely honest, we'll be the first ones to tell you upgrading to a much faster solid state drive is the perfect upgrade for any PC still relying on a standark disk drive. Having that said, it's easy to forget mechanical disk drives are pretty impressive technology.
A popular YouTube channel called The Slow Mo guys recently posted a video of a hard drive cracked open and then shot at 1000fps. Check out the video and judge for yourself.