Everyone should know how to play three card monte. I learned decades ago and it has been immeasurably helpful.
This video by The Card Trick Teacher will teach you the con, and the sleight of hand. It is very simple to learn 'the throw.' The thing these internet videos leave out is, don't use bordered cards! You'll get caught really, really quickly.
These Bee Club Special playing cards do the trick. The pattern on their backs runs right up to the edge of the card, and it is very hard to see that the throw is happening. They are also made by US Playing Cards, and are the same lovely quality as my beloved Bicycle decks.
Remember, you need a few friends to make this hustle work.