A spin bowler usually bowls quite slowly and puts tremendous spin on the ball causing it to bounce at an angle off the pitch, forcing the batsman to treat each ball carefully. Generally spin bowlers give up the most runs but they all have "tricks" that they use to fool the batsman and get him or her out (such as the arm ball, googly, flipper, topspinner or doosra). Spin bowling is very much about deceit rather than speed.