Ha, first injury! My girlfriend's boy (I guess "our" boy now) had an accident bowling a few weeks ago that also resulted in his first stitches. I was out hiking in St. John's, New Foundland with my cell phone off during the whole ordeal. About three hours later I turned it back on to immediately recieve a, "Where the heck have you been?" call from the lady. I'm like, "Uh, hiking?" She explained what happened all upset, and I just say, "Uh, and?" She was just being Mom... freakin' out at the cut. I told her, ya know, boys will be boys and all. Expect worse, especially if I get my wish and he plays hockey and baseball.
Five stitches later, he wanted to get back to the lanes to bowl some more. There ya go, my little man!
I realized very early that you can't protect kids from everything. They need to fall down and get bumped up sometimes so they can learn how to pick themselves up and carry on. Boys will be boys...