I think he had checked out already, after the team hadn't scored in the first eight innings and didn't think he'd play tonight.
I think Matt Stairs is always anticipating an at bat late. That's pretty much the only time he gets at bats.
IDK what he was looking at... maybe what the rest of the Nats were looking at for the first 8 innings. Halladay is that good, and it's not always obvious why on television. Maybe he just froze.
Edit: Regardless, it was unacceptable to be frozen in that situation, obviously.
