<P> A boundary is the scoring of four or six runs from a single delivery with the ball reaching the boundary of the field . Occasionally there is an erroneous use of the term boundary as a synonym for a "four". For example, sometimes commentators say such as "There were seven boundaries and three sixes in the innings ." The correct terminology would be "There were ten boundaries in the innings of which seven were fours and three were sixes". </P> <P> Four runs are scored if the ball bounces before touching or going over the edge of the field and six runs if it does not bounce before passing over the boundary in the air . These events are known as a four or a six respectively . When this happens the runs are automatically added to the batsman's and his team's score and the ball becomes dead . If the ball did not touch the bat or a hand holding the bat, four runs are scored as the relevant type of extra instead; six runs cannot be scored as extras, even if the ball clears the boundary, which is in any case extremely unlikely . Prior to 1910, six runs were only awarded for hits out of the ground . </P> <P> Four runs (or more) can also be scored by hitting the ball into the outfield and running between the wickets . Four runs scored in this way is referred to as an' all run four' and is not counted as a boundary . </P> <P> Four runs are scored as overthrows if a fielder gathers the ball and then throws it so that no other fielder can gather it before it reaches the boundary . In this case, the batsman who hit the ball scores however many runs the batsmen had run up to that time, plus four additional runs, and it is counted as a boundary . If the ball has not come off the bat or hand holding the bat, then the runs are classified as' extras' and are added to the team's score but not to the score of any individual batsman . </P>

Who hit six sixes in an over in one day international