"I don't know. I wish I did." Since he's already spilled the bean, and he knows that Phil would have figured it out anyway, he doesn't bother trying to shrug it off or neglect details. What few details there are, anyway.

"I woke up like this. Nothing strange happened last night, either, so unless it's some kind of injury from the earthquake, it isn't a bad reaction to anything." Realistically, he knows that it's possible that he suffered some kind of brain injury. He just really hopes that he hasn't.