One of the first self working tricks I learned as a kid. Although I do the trick face down so I never see the card myself. I show piles to the person and they say whether the card is there. Once you know the card is in the 11 spaces. You can make it seem like you guessed the wrong pile. And I deal 4 face down piles (noting where the 11th is) Ask the person to choose piles and remove each one other than the marked pile. Eventually deal out the last five face down (chosen card will be 3rd) and let them choose and discard as before until you have one card for the reveal.
