steven@ism70.UUCP (08/30/85)
The Twin Pines Mall changes to the Lone Pine Mall in the modified future. Doc Brown says that the land the mall is on used to belong to Old Man Peabody. So when Marty travels back in time, he ends up in Peabody's farm and, when making his hasty getaway, runs over one of two pines growing near Peabody's mailbox. A sign says "Twin Pines Ranch" and you can hear Peabody say as Marty drives off, "You son of a bitch! You killed a pine!"