I laughed when i saw it and upvoted.
However, dont forget it really didn't affect his experience, Bush does not look surprised, concerned, alarmed or shaken and continues reading for 20 minutes after that point where he is told of the 2nd attack, sorry to remove the joke part.
For many years people thought that the video of the book reading was showing him being told of the first plane hitting. This would make his lack of concern somewhat valid as he could be excused for thinking it was just a mistake, pilot error.
But as it's when the 2nd plane has hit this is why you would find me calling him a traitor as do many others. He sits around reading a book about a goat after a 2nd plane has hit which shows he was not in any danger. But it does fuel the speculation that he and his staff knew the events were going to happen because once the 2nd plane hit next door it was no longer too early to judge that it wasn't an accident but clearly deliberate and obviously terrorism.