Houdini's last magic trick

A magic trick you can perform with your phone. The magician shows photos of Houdini, and asks the spectator to look into Houdini's eyes and think of a card. When the spectator says what his card is, the magician shows that Houdini's brother is holding this exact card in his hand in a photo taken more than 100 years ago. Watch the demo video to see the entire effect.