You might be walking through a mall or a street market and get called to by a woman (maybe wearing a doctor’s smock) at a table full of magnets who invites you for a 2-minute feel therapy, for just a few bucks. She starts moving a magnet all over your body or on the specific areas you say are hurting. She claims magnetic therapy will get rid of any ailments you might have and make you feel much better. You probably do feel a bit better afterwards but that’s just the effect of suggestion.
How to avoid: magnetic field lines have no influence on the human body, so don’t fall for this therapy, as it is just a shameless scam.