Sugita-san's character never fail to make me laugh.
I'm pretty sure all the random shouting are his ad-lib. All his not-serious characters did that.
I've been watching the last three episodes in succession, due to some traveling. A lot has been said about how these three episodes do a good job on make the viewers actually feel like they're experiencing the festival themselves. I have to say it works even better watching in one go because the "excitement" never goes down.
Looks like we'll dive back to a mystery-solving episode next week though. I wonder if they'll change the tone or just keep up this "fun" atmosphere. I sure hope it'll be the later.