Back to the Future or Miller's Crossing?

Are you a fan of Miller's Crossing? Of Back to the Future as well? Prove it! Select which quote belongs to which movie and see how good you are:

If you want me to keep my mouth shut, it's gonna cost you some dough. I figure a thousand bucks is reasonable, so I want two.

Nobody knows anybody. Not that well.

If I'd known we were gonna cast our feelings into words, I'd've memorized the Song of Solomon.

- We better back up. We don't have enough road to get up to 88.

- Roads? Where we're going, we don't need roads.

- 1.21 gigawatts! 1.21 gigawatts. Great Scott!

- What-what the hell is a gigawatt?

If my calculations are correct, when this baby hits 88 miles per hour... you're gonna see some serious shit.