Never saw the Rescuers gag… (Just looked it up though)
I have noticed single frame gags before though. Unfortunately, I have to think of the Fight Club penis. If you don’t see that schlong you’re blind.
Note: I keep finding compressed bs of what I assume to be this release. Sticking with my censored Blu-ray.
It’s not a ‘gag’. It’s something cut in by a disgruntled employee. It wasn’t done by the animators. Not worth tracking down.