I think he was just HUGELY pissed at Crabtree and had not yet had time to cool down.
Pretty much.
And from what I saw, Crabtree was a total sore loser dick and wouldn't even shake his hand.
I'm not saying I endorse Sherman's behavior... but I understand.
Sherman was mouthing off to Crabtree and then wanted to shake his hand, it was planned by Sherman to get Crabtree going.