Ugh, robin Williams. You find yourself screaming at the screen, “No! Don’t take your shirt off! Don’t! Noooooo — ye gods!”
Wacky guy with wacky issues does wacky things. Stuffy person/people don't like it, and scowl a lot. Wackiness is halted. Wacky guy gives impassioned speech. Wackiness is continued through altered, slightly more subdued means. The day is more-or-less saved.
This arc worked in "Good Morning, Vietnam" but his subsequent 4,342 films that used the exact same meme got a bit boring.