Many Hypnotists over the years have worked in entertainment as well as therapy and provided shows for the entertainment industry.
For many, seeing people hypnotized on television or on stage is their first exposure to Hypnosis and often this is what convinces people that it works.
The hypnosis stage show is popular as both public and corporate entertainment.
There is disagreement within the hypnosis profession if stage hypnosis is ethical. It appears this question is less about stage hypnosis itself and more about how the stage hypnosis is presented to the public.