one of the guys charlie talked about being in a custody battle for his son earlier in the season. in the episode last night they were all drinking having a good time playing around when charlie pours some water on tony's head as a joke and tony flips out. they start fighting and when its broken up tony starts talking **** to charlie about his son like "where is your son?" "hit me instead of your son" with as far as we know no basis to that claim.
that was at the end of the episode but in the first fight Zach the guy from Maryland gets both his retinas torn against Chuck and is told by doctors that he can't fight anymore or he could go blind in both eyes.