Over at Metafilter.com I found this great article on the WB cartoon by Chuck Jones, 'What's Opera Doc.'

First the full cartoon can be found here: https://vimeo.com/444002896

If you've never seen it, or if it has been decades since you've watched it I'd say go and lay your eyeballs on it now. It's a classic.

The article is here: https://animationobsessive.substack.com/p/why-whats-opera-doc-looks-like-that

It lays out details that made this the most expensive Bugs Bunny cartoon, and how the team cheated the bean counters to get it made.

(Edit: It's worth reading the discussion over on Metafilter. Other great Looney Tunes cartoons are discussed along with links.)