Whoa. This is heavy. And impressive.

Seamlessly blending a load of clips from a slew of movies, editor Tyler Hopkins has built a studio-level trailer for a Back To The Future mock-prequel 1.21 Gigawatts.

Telling the story of how Doc Brown got his hands on that plutonium from the Libyans, Hopkins pulled footage from 12 movies including Back to the Future, My Favorite Martian, Camp Nowhere, Things to Do in Denver When You’re Dead, Dennis the Menace, Zero Dark Thirty, Argo, The Sum of All Fears, Syriana, Iron Man, Dazed and Confused and Munich.

Great Scott, indeed.