At the WGA, West web site, there's an interview with Prof. Laurie Levenson of Loyalo Law School, who serves as a technical advisor for productions with courtroom scenes. It's titled "Trial And Error", and she mentions how some writers go a little over the top on these things. One movie she says that surprisingly got it right (and I agree, especially with the Southerness of it all) is MY COUSIN VINNIE, written by Dale Launer.

That's a really good movie. Here's a choice side of dialogue from Joe Pesci's character:

"It's a procedure. Like rebuilding a carburetor has a procedure. You know, when you rebuild a carburetor, the first thing you do is you take the carburetor off the manifold? Supposing you skip the first step, and while you're replacing one of the jets, you accidentally drop the jet, it goes down the carburetor, rolls along the manifold, and goes into the head. You're fucked. You just learned the hard way that you gotta remove the carburetor first, right? So that's all that happened to me today. I learned the hard way. Actually, it was a good learning experience for me."

Launer can write straight comedy as well -- if not better -- than anyone else today, I believe. Hopefully he has another VINNY or DIRTY ROTTEN SCOUNDRELS or RUTHLESS PEOPLE in him.

For whatever reason, Launer has not been very active in the last decade with only one movie since Love Potion No. 9 in 1992. Here's his IMDB page.