I noise this about at every opportunity.
There's a type of Chiropractic (not "chiroporacty") that even chiropractors think is woo-woo. See
here for a general description of Network Spinal Analysis, and
here for a practitioner whom I used to know. Here's an excerpt from the latter link:
In practice, the patient lies face down and relaxes. The practioner lightly touches a spot on the patient's back, then steps back and observes. Eventually, the patient will twitch, and that twitch is supposed to be their body reacting to both the touch and the subluxation. This treatment is eligible for Medicare, Medicaid and Blue Cross and, presumably, other health insurance.