George McFly: Now, Biff, I want to make sure that we get two coats of wax this time, not just one.
Biff Tannen: I'm just finishing up the second coat now.
George McFly: Now, Biff, don't con me.
Biff Tannen: [stammering] I'm sorry, Mr. McFly. I-I meant I was just starting on the second coat.

I like clever.

Back to the Future is perhaps the most clever movie ever made.

Whattaya know, I like Back to the Future.