When nails connected with flesh and then flesh pulled away again, Kevin hungrily lapped at the blood dribbling down his fingers, momentarily distracted as he tried to sate his hunger in any way possible -

Giving Max the very easy chance of getting the wire around his opposite hand. The one still gripping the limb of his "mother."

He didn't have time to react, his lack of sight and blinding hunger getting the better of him for a rare instant.