These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Big Lipped Alligator Moment: Alvin's encounter with a crazily distraught woman who keeps on accidentally running over deer. The only thing it really adds to the film is that Alvin eats the deer and mounts the antlers on his tractor.
Heartwarming Moments: When Alvin Straight meets his brother and neither of them say anything, but are able to acknowledge each other one last time.