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.
YMMV: One Froggy Evening
Alternate Character Interpretation: Some have speculated that the Frog is deliberately not singing for the man in order to get him in trouble. Some even speculated that the man was hallucinating the frog dancing, but this has obviously been Jossed. The ending to Another Froggy Evening gives the implication that the frog will sing if properly asked.
Broken Base: It's been observed that, like Michigan J. Frog, the cartoon itself only "performs" for certain people.
The Woobie: Admit it, you felt bad for that guy at some point or another.