Usually when we think of placebos, we think of pills, but sham surgery has actually been studied a fair amount - it is used to create a control group for studies that try to determine how well real surgery works. That is, you are able to answer the question: does a sham version of this surgery work as well as a real version?
"A pill can provoke a placebo effect, but an injection produces an even stronger one. Cutting into someone appears to be more powerful still."
As for me, I'm hopin'
Not to get cut open.