Have you ever watched the TV show with the masked magician that exposed all of the tricks?
I down loaded a free magic book on my IPad. All card tricks are based on a few fundamentals and then the story or trick is built around it.
Same with most magic tricks. They are based on a few fundamentals and then are elaborated on using different props, stories and etc.
Trick shots in pool are built on a few things and Anton mentioned Tangent line, and speed are the basics. Get fancy and add props.
The more difficult stuff takes practice.
I attended a dealer school to work as a dealer in a casino. The instructor who was a retired pit boss said that there are more doctored decks of cards sold then regular. Magicians always use a doctored or trick deck.
Here is a very simple trick or gimmick that many have seen. A magician will call or pick someone out of the audience. It could be by tossing out a balloon. Have you ever noticed that the background of the stage is always black?
The magician will ask the person a bunch of questions that the person will answer. He will then say that at the start of the show he wrote down some words on paper and placed them in a "sealed" box. He will stall around while a assistance dressed in black casually walks onto the stage behind him carrying a pedestal table to put the box on. Guess what is on that table? A envelop with piece of paper in it that the assistant wrote the persons answers on.
The magician now places the box on the table. Opens it up and "takes" the envelop out. Hands the envelop it to the person to open and read the folded paper. Amazingly it has the answers on it.
