I could see that. There is a solid boundry to compare it to. You can look and tell if the ball his the line, or what side of the poll the ball left the park on. Also isn't something that would come up very often in a game One of the other things was whether or not a ball hits the pole. Gammons said that with the new designs of parks it's only getting harder for the umpires to make the correct call. Now that I think of it, he mentioned having it as a resource when it comes to the possibility of fan interference.