I discounted that pretty early. I know that I can personally look interested to disinterested in a hand and whatnot. He's not quite that good. He's mostly an ABC kinda guy.
In a really strange scenario, he could know this and then purposely try to use that against me, but it had been a long session, so I doubt he was going to try and get THAT creative at this stage of the game.
This guy is pretty straight forward though. And he's not the type to put his money in like that unless he has a really big hand.