Originally Posted by Vidic
His backfoot failed because he couldn't unplant his front foot because it was momentarily stuck against/behind Judahs
If there wasn't a blocking of feet, I don't think anyone can say that he would have lost balance in the same manner
So he could not un-plant his front foot, that does not prevent him from planting his back foot. His back foot was unable to steady itself thus it was a legit punch related affect.
Was it a KD? If you are going by the rules I say yes. But to be honest too, not like it was some great KD even if you count it. To PBF's credit, if this is what they will count against him, it says a lot about his great defense and possibly his chin.
I don't think he has an iron chin like Hagler or Margarito. but he does have the ability like JMM where he can be flash KD but he recuperates quickly that opponents are unable to fully take advantage of the situation (see PBF vs Mosley).