Penn & Teller (Penn Jillette and Teller) are Las Vegas headliners whose act is an amalgam of illusion and comedy. Penn Jillette is a raconteur; Teller generally uses mime while performing, although his voice can occasionally be heard throughout their performance. They specialize in gory tricks, exposing frauds, and performing clever pranks, and have become associated with Las Vegas, atheism, scientific skepticism, and libertarianism.
Penn Jillette has told interviewer Larry King that a big part of the duo's success and longevity is due to their never having been close friends. They enjoy working together immensely, but have little in common besides magic. As a result of their drastically different lifestyles and interests, they rarely socialize or interact when not working. Jillette believes that their partnership succeeds precisely because they give each other a great deal of space off-stage.
Their tricks include Teller hanging upside-down over a cushion of spikes in a straitjacket, Teller submerged in a huge container of water, Teller being run over by an 18-wheel tractor-trailer, Teller swinging going through Penn's hands. Many of their effects rely heavily on shock appeal and violence, although presented in a humorous manner.
Sometimes, the pair will claim to reveal a secret of how a magic trick is done, but those tricks are usually invented by the duo for the sole purpose of exposing them, and therefore designed with more spectacular and weird methods than would have been necessary had it just been a "proper" magic trick. For example, in the "reveal" of one trick, while Teller waits for his cue, he reads magazines and eats a snack.Another example is their rendition of the cups and balls, using transparent cups.
Penn and Teller perform their own adaptation of the famous bullet catch illusion. Each simultaneously fires a gun at the other, through small panes of glass, and then "catches" the other's bullet in his mouth. They also have an assortment of card tricks in their repertoire, virtually all of them involving the force of the Three of Clubs on an unsuspecting audience member as this card is easy for viewers to identify on television cameras.
The duo will sometimes perform tricks that discuss the intellectual underpinnings of magic. One of their acts, titled "Magician vs. Juggler", features Teller performing card tricks while Penn juggles and delivers a monologue on the difference between the two: jugglers start as socially aware children who go outside and learn juggling with other children; magicians are misfits who stay in the house and teach themselves magic tricks out of spite.