Enjoy the Video.
have your friend shuffle, fan out the cards face-up
"guess" the card by glancing at the first two cards you see. in this case, there's king, and the second card is spades. look at the pictures. pull that card out- the king of spades, in this case.
ask for a number between 5 and 25. in this case, it's six.
lay the cards into two piles as demonstrated in the photo and the video.
flip over the top two cards, and there you have it... King.... Spades.