Oh and the battery gaff one is dead easy to do and gets a fantastic reaction. You star with the jack battery gaff then the double backer, with regular back facing u and 2 indifferent cards. You hold the batteries under the deck. You DL and show an indifferent and do a one stage ambitious card. You then really do put the card in after showing its jumped to the top and DL to show the jack the say 'oh...the batteries must be dead' and use the misdirection to flip the double backer on top of the jack and show the two batteries. then flip it back over and pull off the jack with the batteries and pop them into a spectators hand and show the card, its dead clean and no-one suspects a thing.
This is basically the same for the 'Jackpot' Card which is also very good
