You guys are looking at this like it's a rational customer. For the 4,000 customers I have, they get a more diplomatic answer. This guy is not built like that, a weak answer is seen as a sign of weakness. He's actually a nice guy, and I like him, but when it comes time to talk, he starts talking like Batman (closer to Christian Bale's version, not Adam West's). As soon as the contract signing is over, he goes back to being a nice guy. It's Dr. Jekyll/Mr. Hyde.
For the last eight years, if I try to lighten up the wording, whether it's email or in person, he doesn't even hear it. He's not usually this bad, but the other few times he's been like this, the only time I was able to get a fair deal has been when I've slammed the door. Other than that, he'll just yell for an hour straight and expect you to sit through it.
I don't know any other way to say it. He's one of those guys. You have to yell loud enough to get his attention, other than that, he's yelling so loudly he won't notice you.