This was disturbing to watch trying to watch Mr Campbell perform while deteriorating from Alzheimer's. My mom had this disease and watching the documentary brought back terrifying memories of someone who was losing their identity and humanity. Possibly the hardest part of this documentary was watching Mr Campbell "perform" in his last concert in California - he couldn't remember what song he was doing and spent most the time arguing with the band (another symptom of Alzheimer's). At one point he was arguing with his wife about what he was suppose to call his shoe. This is scariest scenario I can imagine - watching yourself slip to the point where you don't even recognize your own face. I'll take anxiety any day just let me enjoy the sunrise and recognize familiar voices. Hopefully the research will help alleviate this disease and others. Thankfully Mr Campbell had a very loving family surrounding him - this is not my case. Facing this alone would seem impossible - the dread continues.