Charlie: Ray, we're at an airport. People fly out of airports. What'd you think we're doing here this whole time?
Charlie: Ray, all airlines have crashed at one time or another, that doesn't mean that they are not safe.
Raymond: Qantas. qantas never crashed.
Charlie: Qantas?
Raymond: Never crashed.
Charlie: Oh that's gonna do me a lot of good because qantas doesn't fly to Los Angeles out of Cincinnati, you have to get to Melbourne! Melbourne, Australia in order to get the plane that flies to Los Angeles.
Charlie: What's it going to be Ray? What's it going to be?
Raymond: This is a very dangerous highway.
Charlie: How am I going to get to LA?
Raymond: Course driving your car on this interstate is very dangerous.
Charlie: You want to get off the highway will that make you happy?
Raymond: Yeah.
Charlie: Yeah, well you gotta GET in THE CAR SO that WE CAN GET OFF THE highway.
Raymond: Course in 1986 46,400 male drivers were definitely involved in fatal accidents.
Dr. Bruner: Well, Raymond? Aren't you more comfortable in your favorite K-Mart clothes?
Charlie: Tell him, Ray.
Raymond: K-Mart sucks.
Dr. Bruner: Oh, I see.
Charlie: Hey, Ray: you just made a joke.
Raymond: Yeah, a joke. Ha ha ha... ha.
Charlie: I'm gonna let ya' in on a little secret, Ray. K-Mart sucks.
Charlie: Does Raymond know how much money he's inherited?
Dr. Bruner: No, he doesn't understand the concept of money.
Charlie: He doesn't understand the concept of money? He just inherited $3,000,000 and he doesn't understand the concept of money? Wow, good work, Dad. I'm getting fucking poetic here.
Dr. Bruner: Raymond, wouldn't you feel more relaxed in your favorite K-Mart clothes?
Charlie: Tell him, Ray.
Raymond: K-Mart sucks.
Dr. Bruner: Oh, I see.
Answer: When they were children, Ray witnessed Charlie being burned by hot bath water. I think Ray says something about how he was left to look after Charlie while Charlie was in the bath, and Charlie got burned by the hot water. That memory must be very strong for Ray, and not comprehending the passing of time, Ray did not want to see Charlie hurt again.
Mark English