Luke being a troll - I hate a few of the scenes, because I don't like embarrassment-based humor, but I actually can see how he'd end up like that. Because that's the exact same thing Yoda did, after the Purge. It's a (bad) coping mechanism, and a learned one at that.

Can't say it's my favorite part of the movie, though. Or at least, I wish the movie was better at showing it as a trauma response, not as a joke.

I wish I could properly admire the throne room fight, but alas.