For people who don't know, the theory of chiropractics is that the light of God somehow shines into the human body through the top of the head, travels down the spine, and on through the nerves. If you can just fix any blockages (aka "subluxations") in that flow then it will be impossible for disease to exist in the body. Because God's light.
The founder of chiropractics was told this information by a ghost.
I know some people swear by chiropractic adjustments, but this is information I wish I'd known when I had my back injury because going to a chiropractor set my recovery back by at least three years. And the money I lost to that quack could have paid for not only the legit physical therapist that actually got me feeling better, but probably a decent massage chair too.