I had read the transcript but have not seen this interview yet, but I was still surprised by the nasty and mean tone he used. He certainly sounded out of control.
It's the body language that is so telling. If you read the transcript and even hear him speaking you don't get the entire flavor of his rage.
The Chris Wallace/Bill Clinton interview is on Youtube:
http://www.youtube.com/watch?v=UaNIBFSMjb8 (Part1 - When he first loses it)
http://www.youtube.com/watch?v=lT7yKfXN4p0 (Part2 - Ongoing rant)
http://www.youtube.com/watch?v=oinw73s-wdo (Part3 - Clinton Global Initiative)