Doc: "The clothes fit?"
Marty: "Yeah, everything except the boots, Doc. They're kind of tight. I don't know. You sure this stuff is authentic?"
Doc: "Of course! Haven't you ever seen a Western?"
Marty: "Yeah, I have Doc, and Clint Eastwood never wore anything like this."
Doc: "Clint who?"
Marty: "That's right. You haven't heard of him yet."