This is also not professional and minus for Yanotti.
We have people with accents, with articulation problems, with stuttering. The defence is "reasonable doubt"-based, not reducing to personal attacks.
So that wasn't Yannetti (who's a Boston-local and would have understood the witness). It was the Californian, Alan Jackson.
And I just don't see the exchange the same way that you do. I don't think he was being unprofessional or making a personal attack on the witness.
Jackson couldn't understand the witness's pronunciation of "furrows" and asked for clarification. Afterwards, he apologized and said "I'm on your turf". The whole courtroom was laughing and the witness then referenced My Cousin Vinny.
If anything it was a lighthearted moment in what's looking to be a very tense trial.