The human brain recognizes and is drawn to symmetry and patterns. Using patterns, structures, and routines—what scientists call mental models—makes people efficient. Routines are so ingrained that people can do them without thinking: getting dressed in the morning, driving to work, doing laundry. The ability to go on autopilot means their brain can use that time to think about something else entirely—a distinct evolutionary advantage.
How does it work? There are several ways of doing the trick and one of the most popular is all about the magic equipment. The magician wears a special finger stall with a small, but very sharp blade. After showing the audience that the bottle is whole, he secretly cuts a line in it that's big enough to push a phone through. No magic here, really. Just a sleight of hand.
Unlike card tricks done on the streets or on stage and card cheating, cardistry is solely about impressing without illusions, deceit, misdirection and other elements commonly used in card tricks and card cheating. Cardistry is the art of card flourishing, and is intended to be visually impressive and to give the appearance of being difficult to perform. Card flourishing is often associated with card tricks, but many sleight of hand artists perform flourishing without considering themselves magicians or having any real interest in card tricks.
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Make a pencil float in the palm of your hand. This one is as easy as can be—just clutch a pencil in one fist with the back of your hand facing the audience, then grab your wrist with your opposite hand like you're bracing yourself for a great effort. Without attracting attention, slowly outstretch the pointer finger of your support hand and use it to pin the pencil to your palm as you open your fist. When done correctly, it will look like the pencil is hovering in front of your hand.