You're fucking dominating the game, and your QB is going to singlehandedly fuck you.
I was at the game, up behind the Texans bench. At one point - 3rd quarter, IIRC - the Texans defense was making an important stand against the Bengals. The entire Texans bench - players, coaches, kit boys...everybody - was on the sideline waving and cheering on their teammates.
Well, not everybody. Schaub was sitting alone on the bench looking at the floor. Miss Limey has a photo of it - I'm thinking of sending it to McNair.
Also, Miss Limey swears she saw Schaub flip off the crowd as he was getting booed off the field in the 2nd quarter. Unlike the Vikings game, when the booing could've been construed to be for the pathetic performance of the offense as a whole, the booing this game was very obviously directed at Schaub and Schaub alone. He seemed to have understood that.