It’s Madarame’s first time being alone with Saki. It’s also the first time we see Saki reading a manga. I repeat, SHE’S READING A MANGA! How unexpected.
Madarame made a fool of himself trying to strike a conversation with Saki. He was the only one so affected by the moment. 
And… WTF… He notices the smallest details like NOSEHAIRS!?
*gah* This episode’s such a waste. I hope the fun picks up again in the ff. episodes.