With regard to the job H&S risks of "Mugging" as a career option, an old saying springs to mind: "If you can't do the time, don't do the crime"…
For the future, y'all might want to note that a punch to the throat has two major advantages over a punch to the face –
1: There's no risk of damage to your hand
2: It requires much less force and disables the opponent instantly.
It is best to form the hand into a "Puma strike" rather than a fist.
That is to say, fold the fingers under the palm at the second joint, laying the thumb alongside, tightly.
Pip, pip! 😉