OUCH....why :(

It's just a ordinary every day day for Damen, Deven and I. I'm cleaning the bathroom upstairs, feeling pretty dang good about myself for getting it done too! I can hear Damen and Deven, going at it, NOTHING major at all, and then I hear screaming. I hollered out, since the bathroom is about 10 feet from where they were playing, "KNOCK IT OFF!" I'm now inside the tub scrubbing it and they both come running into the bathroom. All Damen said was, "it's not my fault, he wouldn't leave me alone." I turned around and saw Deven covered in blood. Damen got mad and threw one of his many fire trucks at Deven's head, accidentally cutting it wide open. Friday was the LONGEST day ever...........EVER!!