MegaBox by Mario Tarasini video DOWNLOAD
Spectator chooses one card and signs on it.
The selected card is placed in the middle of deck and the deck in to the box.
The magician puts a joker behind a box of cellophane and... the joker turns into a card chosen by the spectator!!!
The trick is almost impromptu.
One second of preparation and you have a trick you will be able to perform many times.
The Box can be given to the spectator before and after the trick.