Pick one of the following cards. Don 't click on it - just keep it in your head.
Now, think about the card you picked in your mind for a few seconds, then scroll down past the blank space. As you think about the card, I will attempt to "read your mind" and remove the card that you have selected.
I have now removed your card!
COOL ISN'T IT. Now scroll up and do it again, this is so cool.
HT to Things That Make You Go HMMM
Check out his comments section to find out how this trick is done.