This was pretty much what I expected from both of them. He would be pretty excitable and eager to interrupt some. She is trying to play herself as “in control” hoping you don’t actually focus on her content.
Unfortunately, what they are saying is often lost in the delivery. Thankfully, he is slowing down and keeping a cooler head. That said I wish that this debate was set up in a fashion that allowed him to question her and then her come back with a question for him. The questions being asked seem designed to play to her strengths and point out his weaknesses. The moderator doesn’t have to interrupt their responses because the entire event is already designed to make him look less prepared to lead.