David Blaine and Dynamo performed together in our college fest. I was chosen to be performed a card trick on. Blaine asked me to shuffle a deck of cards and when I was done, he asked me to pick any five cards. I did as he had asked and showed my selected cards to Blaine.
Out of those five cards, he gave four to Dynamo and one back to me. Upon looking at those four cards, he was able to deduce the card I was holding.
I was shocked. It was brilliant. But when I was returning back home, I thought about it and was able to crack the trick.