There's a scene in which Billy is prepping a deponent, his own witness, and conveys his five rules for depositions (full transcript):
But look, a deposition's not rocket science. There's a way to deal with them. You know? There's really five simple rules.
When they ask you a question, if you don't understand it, just ask them to repeat it. All right.
Then 2, if they mention a document, just ask for it. Tell them you want to see it. Right. I want to see it. Yeah. Even if you already know what they're talking about, it f*cks their rhythm up. That's what happens, yeah.
3, you should answer with as few words as possible. One is best if you can. Keep it brief. ....
4, if I object to something, don't say a f*cking word until I say so. Okay? Keep it quiet. ...
And 5, uh, about every hour or so, ask them if you can take a p*ss because that way you and I can talk with each other.
