Massé shot

Illustration of a player performing a massé shot.

"Massé" refers to imparting a high degree of spin along the vertical axis and often on the horizontal axis as well, such that the cue ball reverses direction, sharply curves, or both a few moments after being struck without the necessity of ever contacting another ball or rail.
A massé is performed by hitting the cue ball with the butt of the cue stick elevated; usually by 60 degrees or more. While controlling the aim, speed and curve of the cue ball takes a great deal of practice to master, there is a science to it. After the initial contact, the cue ball will travel straight along the path defined by the horizontal alignment of the cue until the cue ball slows enough for the imparted vertical spin to take over. The cue ball will then curve onto a line defined by an angle described by the cue ball's initial resting point on the table and point on the table where the cue tip was aimed. The time before vertical spin overcomes horizontal movement is determined by the force with which the cue ball is struck. Massés are quite difficult for non-experts, and are not allowed in some venues, as the table's cloth can be easily damaged by unskilled players.