Magic cards, bloody misifying if you ask me how do they do it
http://www.mizfrogspad.com/Brain_Teasers/LeWoogie/LeWoogie_Card_Trick.htm#step1
yeah how do they do this.
You are not looking closely enough. Answer in the spoiler below for those who don't want to work it out themselves.
[spoiler]The second set of cards are all different, so whichever card you pick it can't be there.[/spoiler]
duh :-[ i should have looked closer ::)
None of the bottom cards are in the top row to start with. Very clever had me fooled for a while :D