i was jumped in similar fashion about 6 years ago, in retaliation for a one on one figh tthat i got in, the kid fell and hit his head on th4e corner of a bumper of a truck, instandly knocked out, blood everywehre, i was like brablem" and left.
2 months later
only to be followed into a bathroom at a restaurant and beaten by the kid and 3 of his friends until i pretended to go unconsious, the physical pain aside, it took me over a year to really trust society and go out alone, it was a very frustrating and unsettling feeling, i coudlnt press charges because i didnt scream, and nobody saw it happen.