I like this:

http://www.guardian.co.uk/science/blog/2011/oct/11/placebos-reiki-cancer-patients-harm

Its basically a (link to a) clinical study that shows that Reiki energy healing has real benefits for cancer patients… it just doesn’t work any better than having some totally untrained person wave their hands around and go “Ohm.”  The author (of the Guardian article, not the study) concludes that, if you’re going to give them a placebo and some soothing human contact, you might as well give them a decent back-rub at the same time.  This should be completely obvious, yet apparently wasn’t to the authors of the original study.  *sigh*