Apparently the big highlight of the French presidential debate between Nicolas Sarkozy and Ségolène Royal people are talking about was where, contrary to expectations, he didn't lose his cool but she did. However, my own impression of the scene from this video excerpt via Le Figaro is that she came across as forceful, even indignant, and the talk of her supposedly losing it is overblown:
Move along, there's nothing to see here.
For another American's impression of the debate, see Boz's Thoughts on the Debate.
BONUS: Here's a clip of their previous encounter back in 1993: