Have a spectator select a card (for one version it is a free choice, for a second version it has to be forced), have it signed, apparently loose it in the deck, and then you either spring the cards onto your baseball cap, or fan the cards before the cap and the previously selected card will appear to be attached to the top knob of your baseball cap.
Ralf explains how you have to gimmick the cap, and he will demonstrate several ideas and handlings of how you can perform this routine.
1st edition 2019, length 30 min.