Shrapnel by Kim Andersen Book 9% Foolproof - A cool

9% Foolproof - A cool way to prove that a selected card is neither located in the top or bottom regions of the deck resulting in an assumption that the card is lost somewhere in the middle

For completeness

which kicked things off in 2018

Very easy and visual

Shrapnel by Kim Andersen Book 9% Foolproof - A coolAn ordinary safety pin is fully examined by the audience. A finger ring is borrowed. Then right in front of their eyes, up close and personal, the two objects impossibly melt through each other. On and off. Over and over. Like a glaring red hot knife through warm butter. At your command, inches from their face, you visually melt fibres through fibres in increasingly unexplainable ways. Then as quick as the wind changes, they no longer penetrate. They