The writers eventually got to write the script they wanted, but there was still one more key difference -- in the last scene, Doc Brown got Marty back to the present by rigging up a time machine inside a refrigerator and carrying it out to the Nevada desert, where it would be propelled into the future by a nuclear detonation.
It was too stupid to make the cut back in the day, but Spielberg recycled it for the "nuking the fridge" scene from the beginning of Indiana Jones and the Kingdom of the Crystal Skull, proving that you just can't keep a bad idea down.
Universal Pictures, Lucasfilm
"... So it's 'No Pine Mall' now?"