Most of the time, magicians are afraid to perform tricks that require them to fold a card. Uncatchable removes that worry - it makes the job of folding much easier to do!
Indeed, your hands will really be free during the entire performance, so you can instead concentrate on card handling.
Effect: A card is selected by the spectator. 100% free choice. Their card is signed and lost in the deck. The deck is placed inside the box. Now for the magic! The cellophane surrounding the box is moved forward a little bit. Then, in the blink of an eye, a folded card appears in the space created by the cellophane! The spectator removes the cellophane, the card is unfolded, and it's their signed card! IMPOSSIBLE!
Placing the cards inside the box will be an easy job too, and trust me, with a little tip, everything will be examinable.