Changing Card~~ As done by David Blaine..

p/s : double lift is the technique where you lift up two card and show the audition the bottom card.. example: you got ace of spade on top of your deck..and second card is ace of diamond.. you lift up two card from the top and show the spectator the ace of diamond..with much practice you'll master it perfectly.. :)

Effect:
A selected card placed between the spectators palms magically changes into a different card !

Working:
Have the assistant select a card and replace it in the deck. Control the card to the top, now Double Lift the top two cards. Show the face card announcing that this isn't their card "This isn't your card - is it ?", the answer should be "No".
Slight distraction:
Ask your assistant to hold out a hand. Which ever hand they hold out say "Not that one, this one." and lift up their other hand ! (smile as you do it).While that little byplay was taking place you should have replaced the Double on the top of the deck. Now push the top card over with your thumb and place it on the outstretched palm in front of you, ask your assistant to cover the card with their other hand. After a couple of attempts to find their card in the deck - and failing !, ask what their card was....make a 'magical' pass over their hands and ask them to look at the card they hold. They should be suitably surprised to find that they are now holding the selected card.Don't forget to use suitable patter (a' la Blaine)"Can I show you something that transcends the mind ?"

my home made videos.. here