Stitches again

We had to take our 11 year old son get stitches Sunday night. He is a very creative thinker and my little inventor. Apparently he decided to make combination exercise equipment and Halloween candy storage gadget made from 2 large eye bolts screwed into the wall and a rope strung back and forth across the room. The eye bolts were screwed into the wall studs or so he thought. As he was doing "chin-ups" from the rope the eye bolt came out of the wall and hit him just above his right eyebrow. This is the second time he has had stitches, the last time it was in the other eyebrow. He had to get 6 stitches amongst much protest of "I'm fine", "it doesn't even hurt" and "I DO NOT need to go to the emergency room"