Your favorite 'little thing' in this movie.
By 'little thing', I mean some trivial, irrelevant, and/or otherwise insignificant thing that is happening in the scene (often in the background and by characters who are not related to what is happening).
For example, the first time they all dig underground and Mr. & Mrs. Fox are about to step on the 'other side of this mineral deposit', watch Kristofferson. He is meditating, and keeps getting distracted by them talking. He finally and very subtly rolls his eyes and gets back to it. This is completely and totally irrelevant to the story, and it not part of the scene, but it is one of the little things you notice with repeat viewings that just demonstrates how much went into this movie and adds to the enjoyment.