Curious, he did look a bit agitated. My dad is diabetic, and even though he regulates his blood sugar really well, there are times occasionally when it gets a bit high or a bit low. He stays right on top of it, as I'm sure Gibbs does. But it definitely affects his mood because he'll start to feel a bit shaky and uncomfortable. Could be that's what drove it.
Then again, he could just be boiling over with intense hatred of Parcells and the Cowboys!
