In the game of cricket, six runs are awarded to a batter who hits a ball all the way over the boundary on the full. Such a shot is referred to simply as a "six". If the ball reaches the boundary, but not on the full, four runs are awarded and the shot is referred to as a "four". These shots are roughly analogous to a home run in baseball, however there is no requirement for the batter to actually run as there is in a baseball home run. It is common to see a batter hit a six, and then remain standing serenely at the crease while the fielding team fetch and return the ball.
In cricket, most balls are hit along the ground, thus minimising any chance of being caught. The two-run difference between a six and a four is not usually considered to be sufficient to reward the extra degree of risk inherent in attempting to hit the ball over the boundary, rather than just to the boundary. For this reason, sixes are rare, while fours are common. Hitting a six is therefore an indication of an aggressive, risky, or just plain desperate approach to batting.