Ok, this is not a joke or something that happened to me, It's just how to do a cool magic trick.

First, get a deck of cards. If it has Jokers, take them out. Now, deal a card. next to it, place another card. Now another. Now do a card beneath the first card. Continue like this until you have 3 rows of 7 cards.

Tell someone to pick a card, but not to tell you. Now ask them to point to the row that their card is in. Whatever rwo it is, put it into the new tiny pile in the middle. I mean, if the person points to the middle, do a row that's not the middle, then the middle, then th remaining row. Now, repeat the process again. Tell them to point at the row, then deal out the cards a last time. They point at the row, then pull out the card in the middle of that row and say "Is this your card?" If it all went well, they should say yes.'

Viola.