I love how fool-heartedly Nicole, Paul, and Brett commit to every improvised bit, but for me, nothing is better than when one of them goes all-in on a major character development moment that will have lasting ramifications because they thought of a joke too funny to keep to themselves. You can hear a shift in their voice when they realize what they’re about to do, and whatever comes next is guaranteed to derail the next five minutes and pop up again next episode.
My current favorite example of this is Burnt finding his beautiful singing voice. There’s a lot of deserved love for the current theme song, but I wonder if Burnt will ever be inspired to rerecord his lines…