4 muggers wouldn't bother mauling a mark they can jog away from and lose in 2 blocks, escalating their crime by an order of magnitude, that's why the entire thing is suspect.Getting an orbital fracture (not fissure) that needs surgery? My bet is that he got hit with a blunt object like a blackjack. It's not that easy to break an orbital bone with bare fists unless you are really strong (which 4 simple muggers just wouldn't be).
