Evil Dead
Enemy of the Gospel
I like the original........the two sequels didn't really have compelling stories........a bit too over the top and slap stick in places.
My point was that when Doc gets hit by lightning he is hovering, not nipping along at 88mph and yet still timetravels. In the first one the car had to be at 88mph AND get hit by lightning. In the third they have to do wacky stuff with a train because 88mph is crucial.
here's your explanation:
- 88 mph has nothing to do with the functioning of the time machine. It just so happens that the time machine is a car, so doc had to set a specific speed that would activate the time machine portion of the car. Otherwise he would be time traveling everytime he put it in gear. 88mph was merely a switch mechanism.
- at the end of the first movie the lightning is not what sent Marty back to the future. The time circuits were functioning as normal.....the time machine was in perfect working order. The lightning was only to provide the electricity needed (1.21 jiggawats) to power the time machine. The time circuits were still what sent Marty on his way back to the future once the power was harnassed from the lightning to enable the machine to work.
- at the end of part II doc is struck by lightning while hovering in the air and subsequently ends up in the old west. He writes Marty a letter which explains what happens. The lightning shorted out the time machine...the time circuits....which sent him hurling aimlessly back in time. The 88mph switch mechanism was moot, as was the time circuits to control his time travel........the whole thing shorted out.
- at the beginning of part 3 Marty and Doc repair the time machine (circuits, switch mechanism, everything) using 1955 parts as Doc instructed in his letter. It was now back to perfect working order so Marty could go back to 1985. Marty instead decided to go back and get Doc, tearing his fuel line in the process and running out of gas. The time machine was back to perfect working order, it just needed gas.....hence the 88 mph switch mechanism was there.......which meant they had to find a way to attain that speed w/o gasoline.