The magician removes a black wallet from his pocket and opens on the table. On one side of the wallet is an envelope and on the other are five small ESP cards. The spectator can choose any symbol they like. They may change their mind as many times as they choose, no force is involved. Once the card has been decided on the magician opens the envelope and one card falls out -- it's a perfect match!

This is a very clever and clean effect. The symbol is different every time and there is no force of any kind!