Here's another attempt at a goose joke in the style of 1970s SNL or Jerry Seinfeld:
Why did the goose get kicked out of the movie theater?
Because it was using a fowl language!
Explanation: This joke sets up the expectation that the goose is going to be kicked out of the movie theater for a typical reason (e.g., making too much noise or disrupting the other moviegoers), but the punchline subverts this expectation by using the phrase "fowl language" (meaning bad language) and referencing the fact that the goose is a type of bird, a "fowl". The humor comes from the unexpected twist on the phrase and the absurdity of a goose being accused of using bad language, which is a human-like behavior that is unlikely to occur in a bird. The joke relies on the listener's familiarity with movie theaters and the unexpected connection between the goose's species and this concept.
This joke is funny because it uses wordplay to create a humorous connection between the goose's species and the idea of using bad language, which is a human-like behavior that is often associated with humans, not birds. The use of wordplay creates an unexpected twist on the phrase, making it amusing and silly.