Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The flipper is the name of a particular bowling delivery used in cricket, generally by a leg spin bowler. In essence it is a back spin ball. Squeezed out of the front of the hand with the thumb and first and second fingers, it keeps deceptively low after pitching and can accordingly be very difficult to play. The flipper is comparable to a riseball in slow-pitch softball. By putting backspin on the ball the Magnus effect results in air travelling over the top of the ball quickly and cleanly whilst air travelling under the ball is turbulent. The lift produced means that the ball drops slower and travels further than a normal delivery. The slower descent also results in the ball bouncing lower. The flipper is bowled on the opposite side to a slider, much in the same way that the top-spinner is bowled. On release, the bowler ''pinches'' or clicks the thumb and forefinger, causing the ball to come out underneath the hand. There must be sufficient tension in the wrist and fingers to impart a good helping of backspin or underspin.