Here’s a very unofficial transcript of a scene from the upcoming film Tropic Thunder, in which Robert Downey Jr. (right) advises Ben Stiller on how to play a character with an intellectual disability. In the scene, the two men are actors discussing a fictional film called “Simple Jack.” (Note: Includes language that may be considered offensive.)

Stiller: There were times when I was doing Jack when I actually felt retarded. Like really retarded.

Downey: Oh yeah. Damn.

Stiller: In a weird way, I had to sort of just free myself up to believe that it was okay to be stupid or dumb.

Downey: To be a moron.

Stiller: Yeah.

Downey: To be moronical.

Stiller: Exactly.

Downey: An imbecile.

Stiller: Yeah. When I was playing a character.

Downey: When you was a character.

Stiller: Yeah, I mean, as Jack. Definitely.

Downey: It’s like working with mercury. It’s how science makes art form.

Stiller: Yeah.

Downey: You an artist.

Stiller: It’s what we do, right?

Downey: Everybody knows you never do a full retard.

Stiller: What do you mean?

Downey: Check it out. Dustin Hoffman, Rainman, look retarded, act retarded, not retarded. Count toothpicks to your cards. Autistic. Sure. Not retarded.

You know Tom Hanks, Forrest Gump. Slow, yes. Retarded, maybe. Braces on his legs. But he charmed the pants off Nixon and he won a ping-pong competition? That ain’t retarded.

You went full retard, man. Never go full retard.