In my virtual shows I started doing a card change with a flap card. I was isolating the card in a glass, then shaking the glass and the card changes to another card. I really like this, as it makes the change really impossible. The method is simple, it uses a flap card and the card it sitting at an angle. The weight of the card keeps the flap from flipping. Then simply shaking the glass allows the flap to flip for the change.
The other night I was watching a hockey game and playing around with using the flap card in the glass as a card transposition. Here’s what I came up with:
Here’s what the trick needs: It needs some scripting to call attention to just one of the cards. Mention that that jack of diamonds is in the glass, so that when it’s appears in your hand, they know something has happened. I think if you mention both cards, it gets confusing.