I bet he thinks twice from now on before doing something like that again. I am sorry that he is so miserable, but he is young and will heal up. Especially with Momma to wait on him!
A good lesson to learn and before the true teen years set in, so that's a blessing in disguise. I thank God right along with you that it wasn't worse and that your insurance had kicked in. God works wonders like that all the time here and I never get over being amazed at His timing.
Pain can be a good thing...it tells you when to quit doing something. Men have such a hard time learning that, no matter what the age.