The spectator selects a card, you loose it in the same place, and the without any mistake you kick a card into the deck, the spectator can even cut to the marked place just to find the selected card!
A new approach to finding a selected card, it uses a regular deck, no gimmicks or special additions , as IMPROMPTU as it gets!

-Regular Deck
-No control to the top or bottom
-100% Impromptu