A problem I always have with my characters are their wrists. I can't figure out a way on how to rotate the hands withouth breaking the wrists and the arms. Here is what I mean:
Here is the Arm on it's normal pose:
And this is what happens when I rotate the hand:
See what happens? Everytime I try to rotate the hand a bit too much that happens, and I got no idea on how to fix that. Why does it even happen? And how can I fix it?
Here is the blend file: