Doc: We'll get the DeLorean and get ourselves back to the future.
Marty: Oh, listen, Doc. I tore a hole in the gas tank when I was landing, so we're gonna have to patch it up and get some gas.
Doc: You mean we're out of gas.
Marty: Yeah, it's no big deal. We've got Mr. Fusion, right?
Doc: Mr. Fusion powers the time circuits and the flux capacitor, but the internal combustion engine runs on ordinary gasoline. It always has. There's not gonna be a gas station around here until something in the next century. Without gasoline, we can't get the DeLorean up to 88 miles per hour.