I can't believe that you're getting so worked up about a comment that was made during the Miller Time videos. Hextall was obviously kidding around with Eidsness during that video. Do you really think that Brad threw his stick, water bottle, and then threw a temper tantrum after Hextall scored on him in practice? If he did, it was probably done as a joke.
From what I have seen of the kid on the ice DURING GAMES, he has remained calm and poised during pressure situations. I haven't seen him react differently, even when he has been scored upon.
That said...all goalies are crazy to begin with, so yes, I would be comfortable with a headcase between the pipes.