Kisame didn't have a witty report. The Chakra sparked in his fingers, and he jerked his head out the way.
Half a second later his teeth were embedded in Duo's ankle and he was trying to decide if that was a good thing or not.
Considering Grayson's current foot issues, it was probably the 'or not'.
This isn't to say he let GO. He did give Duo a dirty look. Filthy boy. Tasted FOUL.
He did released Duo's other foot so he was only holding it with one hand. He figured next would come another blow and he wanted to be able to block it.