i agree with your comments earlier in the thread seige, my suggestion that the ID is self working ignores the importance of presentation and also the relatively small elemment of skill required to find the only card turn upside down. no "sleights" are required which was my main point although i sometimes have fun suggesting sleights are in fact involved and my hand speed is just "too fast"...
in reference to Tomo's comments:
Tomo wrote:There's also the problem of revealing the face down card as you push the cards from one hand to the other.
I find letting the cards "fall" until you get near where you need to be works best, then "push a little" when necessary.
some people have also told me they find explaining why one card is upside down at one end of the deck can be a little awkard around "half" the time.
i prepare my ID deck as follows to overcome this. the "one card" turned upside down at the top (or bottom) of the deck is the joker. whether my presentation is done as a sleight, a mentalism trick of the mind or whatever, at some point the spec has to name a thought of card. i begin by saying "any card, not including the joker".
now, if you own an ID you will understand what i mean when i say that approx half the time i will simply need to do nothing further, while the other half of the time i simplysay, "OK, now let me get rid of the Joker..."
to ensure i dont get "surprised" i always load my ID in it's box with the joker's "back" corresponding to the bike side of the box. this ensures i always know where i am at.