I know you're being facetious, but he (the 11 year-old) has good technique including keeping his chin tucked.
Let me share a personal anecdote: when I was a kid, I played tennis (and went on to play on my college team). When my parents took me (around 11 or 12) to my first pro/coach, he focused on nothing but getting me to hit the ball as hard as I could, as fast as I could, with everything I had. He wanted every shot to be like a rocket blast. He didn't care if the ball went out, into the net, whatever -- just kept focusing on hitting the ball as hard as I could. My parents watched this go on for a while and then approached him inquiring about his method. He told them that if you focused on things like ball control, various technical details, etc. that you will never develop power (which come from the body mechanics) because those things prevent you from moving freely (and you need to move freely to find your power). First, you develop the power, the mechanics, then you take those mechanics and begin fine-tuning them (building off the movement). And over the years, I saw he was right. The kids that first developed power eventually would learn the technical side whereas the kids that first learned the technical side never really had the power.
I think it works the same for any sport or athletic activity because that's how our body learns. These kids IMO are on the right path.
That makes sence..What good is it to be able to hit someone and not be able to do damage..