Disqualification justified?

[VipertheSniper]

Well I've watched the important scene now a few times, and the referee just can't react fast enough. You see when Dirrell slipped, he already wanted to stop the fight, but the punch from Abraham came so fast, there was simply no way he could've done that in time. What are you gonna do, after one fighter has taken a hit that knocked him out, continue where they left off? Sure the fight wasn't interrupted at the time he landed his punch, but I think (not sure) if your opponent doesn't go down from a punch you're not allowed to hit him, and I guess Abraham knows the rules, so I guess he must've thought Dirrell did go down because of the punch he landed before the slip and for him it was fair game. The way I see it Dirrell was slipping already as he took that punch, so I think the decision was right. To really clear this up I guess footage from a high speed camera would be nice