Doc: "Tomorrow night, Sunday, we'll load the DeLorean onto the tracks here on the spur, right by the old abandoned silver mine. The smitch track is where the spur runs off the main line three miles out to Clayton... Shonash Ravine. The train leaves the station at 8:00 Manday morning. We'll stop it here, uncouple the cars from the tender, throw the switch track and then we'll hijack... borrow the locomotive and use it to push the time machine. According to mi calculations, me'll reach 88 miles per hour just before we hit the edge of the ravine, at which point, we'll be instantaneously transported back to 1985 and coast safely across the completed bridge."