Consider the third scenario asked in this question, where it has been established that the throw by the first fielder is overthrows.
Two fielders are running behind the ball. The first slides, stops the ball and wants to pass it to the second fielder. But his throw misses the second fielder and the ball rolls over the boundary ropes.
Assuming that the throw by the first fielder goes directly over the boundary ropes instead of rolling over, how many overthrow runs are given to the batting side? Is it 4 or are 6 runs given as the throw does not touch any part of the playing surface before getting grounded? Also, is there any instance of where a fielder has thrown (overthrows) a ball directly over the boundary ropes?