How do people do the magic trick when..?

Question

They tell someone to pick a card, put the card back in the deck, then they throw the cards at a window and the card the person picked is sticking on the other side of the window?

Answer 1

if you want your illusions shattered, go here =)

http://www.goodtricks.net/cardwindow.htm...

How simple is that?!

Answer 2

That's the fun part of magic.  To let your eyes trick you, and to not know...