Originally Posted by blandman
Put yourself in his shoes. How would you have braced for that blow?
It's instinctive. It protects your head and spine.
By backpeddling and waving my hands frantically in front of me saying, "Wait wait wait, sorry, it was an accident, sorry, wait wait wait..." while looking completely freaked out.
I think my shoulder would be just fine.
Edit: Or better yet by turning and walking away and not opening my mouth to escalate the situation prior to the other guy actually charging.