I'm wondering what's the first trick that comes to your mind when someone hands you a deck of cards and asks you make him experience some magic ?
Well, when it happens to me I usually do some kind of "spectator as the magician but with the magician backing him up if anything goes wrong" trick : pick a card, replace it, control it to the top, and then explain that I'll try to make them choose once again the very same card though the deck has been thoroughly shuffled. They try, they fail (unless they choose the top card, which happens !). I then take back their card, tell them to concentrate on their card and "colour-change" it into their previous selection (I like using the twirl change for that, one of the most powerful changes I know, and also one of the easiest !).
(There is also the possibility to play it the mentalist way by placing their second selection on top and do a DL to reveal the controled card.)
Well, when it happens to me I usually do some kind of "spectator as the magician but with the magician backing him up if anything goes wrong" trick : pick a card, replace it, control it to the top, and then explain that I'll try to make them choose once again the very same card though the deck has been thoroughly shuffled. They try, they fail (unless they choose the top card, which happens !). I then take back their card, tell them to concentrate on their card and "colour-change" it into their previous selection (I like using the twirl change for that, one of the most powerful changes I know, and also one of the easiest !).
(There is also the possibility to play it the mentalist way by placing their second selection on top and do a DL to reveal the controled card.)