@Charred - All parents are somewhat overprotective, so I wouldn’t feel too bad. The last thing I would need to hear is the sound of crushing bones myself, whether in me or in someone else.
I would hasten to point out however that you don’t have to get involved in rough sports to suffer elbow dislocation. You can suffer from nursemaid’s elbow, which true to its name, can happen among babysitters.
If a babysitter extends her harm to yank a cantankerous child, she can suffer dislocation in her elbow as well.
Surely no one would think babysitting could be a dangerous job. Alas, life itself is fraught with dangers. Just be careful in everything you do, and you should come out okay.