personally I think Zab "DIDN'T" punk out, at first Zab said he couldn't see, but after the doctor showed concern Zab changed his words and said he could see and tried to prove to the doctor that he could, but the doctor waved it off.
What do you guys think?
When the Dr. spoke at the end of the fight, didn't he say Zab said he couldn't see before he had even tested him? I'm sure of that and that's probably because Zab thought he was winning the fight