Magician displays a deck of Bicycle back cards. A spectator is asked to select (and sign) any card they wish which you will give away as a souvenir after the performance. The magician then turns this card face down, and proceeds to bites off a piece! They can clearly see the cut-out on the card where it has been bitten through. Finally with a strong blow, the card is immediately restored! The signed card is given to the spectator as a souvenir as promised.
You are supplied with a mechanical double back “Bicycle back” card which makes this effect possible. You use this with a regular matching Bicycle deck (not supplied).
Supplied with the special card and full detailed instructions for the proper usage and presentation of the effect.