It's not uncommon for FarmWife's interest in mules and FarmHusband's interest in Clint Eastwood movies to intersect. In this clip, Clint's character Joe reminds the bad guys that a mule's opinion really does matter:
What's your favorite silver screen moment with an equine reference?
As for my favorite? I can't pick just one, but I'll get back to you after giving it some thought.