Back to the Future or The Godfather Part III?

Are you a fan of Back to the Future? Of The Godfather Part III as well? Prove it! Select which quote belongs to which movie and see how good you are:

- 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.

Just when I thought I was out... they pull me back in.

- 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.

Never hate your enemies. It affects your judgment.

Friends and money - oil and water.