Three-Card Monte is a gambling-type card game that is prohibited from playing for money. There are many compelling stories related to this game in folklore. The game was popular in the United States in the early 1800s.
The game is based on a plain sleight of hand. The controller throws either of the two cards held in one hand. The illusion established is that only the bottom card is thrown at all times. Even so, the top card can be dropped in an identical way to alter the outcome.
People who gamble have been losing money to Three-Card Monte swindles for more than a hundred years.