Mind Reading Bacteria by Dibya Guha

The performer removes a business card from a small manila pay envelope and shows that on the back of it is drawn some scattered random dots.He says that these are actually “Mind Reading Bacteria”. The card is re-inserted into the envelope and placed openly on the table in front of everyone. A spectator may even initial the envelope if he so desires. Next the performer brings forth a deck of playing cards and asks the spectator to select a card. Suppose the 7 of Hearts is the card which the spectator chooses. The participant now takes out the previously inspected business card from the envelope. Surprisingly, the dots on the card have re-arranged themselves to form the 7 of Hearts!!!