In about 1800, a cricket match on horseback was played! Sir Horace Mann, a great patron of Kent cricket was the organizer. The bats for horse cricket were specially made with long handles.
If striker misses a ball and the keeper fails to gather it cleanly, the batsman may take runs. These runs are called byes run, and are scored as extras. If striker, in attempting to play a shot, deflects the ball with part of his body, the batsman may attempt to take a run. This runs are called leg byes. If the striker didn't attempt to the play a shot, leg byes may not be taken.
The umpire is signaling as a dead ball if the batsman attempt to run when, in his opinion, no attempt was made to play a shot with his bat. Batsman may be run out as usual while running byes and form of bye, the ball reaches the boundary; four byes (of the appropriate type) are scored.