I’m a Dad.  So now I’m required to give money to Disney.  I’m a writer.  So when I watch Mickey Mouse I pick apart the storyline.
1. In this episode the gang’s playing instruments.  Goofy’s on Trombone but the slide is stuck.   It must be a little rusty, so to unstick it, he pushes the slide with his foot.

2. He loses his balance and tumbles over.

3. Everybody cracks up.

4. Somehow he ends up on all fours with a trombone on his ass.   Even Pluto’s confused.
So how do they get it off?

5. …