All great tricks are simple!

A lot of people are upset about the audience talking about how the trick is done after it being performed BUT as long as you follow the instructions this can be a good thing becuase it will actually give more credibility in the eyes of the audience that you really did make someone hallucinate. Having said that, one has to remember that we are buying an ILLUSION, not a real magic spell or ancient secret technique to really read minds or plant thoughts into them, and this is a great trick when trying to convey the ability of mentalism for an audience of more than one.