Rain Man certainly didn't ...

Rain Man certainly didn't test really well. If you look at it carefully, you have a disease autism they didn't understand back then, they didn't know in the test audience whether it's okay to laugh or not laugh, because it's a film that's done in a way where, "Well, maybe I'm not supposed to laugh." At the end of the film, Dustin Hoffman gets on the train and doesn't even acknowledge his brother. Not even a glance, nothing. That's why the studio said, "Can't you just have him look at Tom Cruise at the end of the film?
 Barry Levinson

Quotes from the same author

I don't know that you can do it as a satire. I mean, the business is crazy enough as it is. It's like doing Wag The Dog - we took a thing that was almost completely absurd on one level, and then ultimately those things came about.
 Barry Levinson
First of all, just to get Diner made would have been an achievement in that I got a chance to direct.
 Barry Levinson
Creative differences are legendary in this movie business, so we're really not exploring the creative-difference aspect as opposed to the money aspect, or the fact that something can come up in a movie and literally put the whole movie on the line, and this is where producers have to earn their keep.
 Barry Levinson
I don't know what Bruce Willis has done in real life. We know actors have certainly had tirades - that's for sure. I never had troubles with him, but the big issue is really less about what Bruce is, as opposed to - this behavior has taken place, and sometimes it came out at something that had credibility, as opposed to, "No, I want to be fat and have a beard." Other people say, "I don't give a damn about the credibility. I paid $20 million. I want to see a movie star.
 Barry Levinson
We're never going to be the ultimate-insider look. You can do 50 insider looks at this Hollywood business, and the satire didn't intrigue me. I think others can do that.
 Barry Levinson