I think it's so disturbing because of how surreal the photo comes across. I haven't seen it in a couple of years, yet I can see it pretty fresh in my memory.
Obviously, he looks just horrible..but something about the pic all together ( the colors, his surroundings, etc) just gives off such an eerie and extremely lonely vibe. Really sad.
“If you enter this world knowing you are loved and you leave this world knowing the same, then everything that happens in between can be dealt with.” - Michael Jackson