 CONT: When Catwoman and Laurel are fighting in the tower, Laurel is  seen to strike, and crack, the glass window Catwoman is laying on  twice with the metal bar. In the next shot, when Laurel is about to  strike the window for the third time, you can clearly see there are  three widely spaced strike marks on the window already. When Laurel  hits the glass, it creates a fourth strike mark even though it has  been struck only three times.