The hard drive failed. The original owner was going to throw it away and asked me to dispose of it. I couldn't let it go to waste.
I was alittle nervous I'd taken apart many computers but not that many All in ones. Not to mention the last Mac I worked on was an older Power PC series, but the guides and pictures online answered most of my questions.
Buy the right tools and do the research ifixit has a great shop and knowledge base