Exactly. I think he's a bit like Sapp in that regard, a big guy that is afraid of being hit. Time will tell though, maybe he'll get used to it as he gains more experience.
Brock was hit many times by COuture and Hering and even a huge knee by Mir and he never reacted that way. I just think when you have the whole world telling you that One hit with Carwin and lights out and you have been off for over a year because you almost died, that you are a bit more cautious of the punches.
I think Brock reacted poorly to punches being thrown. But I think it's a combination of inactivity as Godfather said, but also the fact that Carwin came in with a Tyson-like reputation of knocking dudes out cold. The bottom line is that the same shit Carwin put on Lesnar won him 12 straight 1st round stoppages against other guys. And regardless of how Brock reacted, that shit didn't stop him.
Carwin threw a lot of punches but only landed a few. Brock has huge forearms that cover his whole head when he blocks.