Trick Shot Billiards is normally set up in competition form. The point of the sport is to make improbable shots. This sport is usually played on pool tables and snooker tables.

Trick shot billiards is a competitive sport played on a pool table. Competitors, usually in a one-on-one competition, execute improbable shots which their opponent must then successfully execute. Each player has two attempts to successfully complete each trick.

The goal in trick shot billiards is to successfully complete more trick shots than your opponent.

Unlike artistic pool where competitors have a list of challenges they must complete, trick shot billiards allows players to create their own shots. There are a number of sanctioned competitions with their own specific rules. In most competitions, players challenge each other to perform tricks and have two attempts at successfully performing a trick.

Balls
Cue Stick
Pool Table
Rack
Various Objects Used For Tricks (coins, baskets and drinking glasses)

Trick shot billiards is a highly involved competition requiring competitors to create and execute challenging and improbable shots. There is a lot of practice that goes into being able to perform these shots on a consistent basis. Training should include learning as many trick shots from competitors as possible because in order to be successful in competition, players must also be able to execute their opponent's shots.

http://en.wikipedia.org/wiki/Trick_shot