If you're too young to remember, Geller found fame with mind-reading tricks and, more famously, mind-powered spoon bending. Swearing that he had actual psychic powers, he used a bunch of sleight-of-hand tricks already well-known to magicians to apparently bend spoons with his thoughts. Of course, any magicians with a moral compass knew exactly what he was doing and made it their mission to take the weasel down. The result was one of the most tense and cringe-worthy appearances in talk show history (in a medium loaded with them):
When Uri Geller was booked to appear on The Tonight Show, host Johnny Carson (a former magician himself) was understandably skeptical about Geller's claims and had called up professional illusionist and psychic head-stomper James Randi to ask how the tricks might really be done. As Randi explained, the easiest way to bend a spoon with your mind would be to spend a few minutes before the show bending the spoon back and forth with your hand until the metal is so weak that it just falls limp when you hold it up to the camera.