Hard to tell.
Sometimes it looks like he's putting his hands up or trying to stand up, only like the last 3-5 shots look like it should be stopped for me. In fact, half way through those shots I'm pretty sure he tries to grab one of his hands to stop the punching.
Could just be me, though.
“Anna, my strong, terrifying Anna.” -Cas
"You lack the requisite spine and testicular fortitude to study under me" -Elodin