Konrad Rudolphin Skeptics Stack Exchange • Recommends
On “Was there a trick behind this magnetic therapy demonstration?”
Yes, this is a trick. There’s a video on YouTube from the link to this video demonstrating how it’s done.
Essentially, the lady tricked you – she didn’t always apply the same kind of pressure, she changed the vector of the applied force slightly. This allows her to apply an equal amount of pressure but without the same effect.