|Anyway how hard could time travel be? Two Slackers from California managed to manipulate it succesfully|
No what I am concerned about are more simple and often overlooked inconsistencies in this movie.
1/. Why do they leave Jennifer in the Alley?
When they first arrive in the future Doc, puts Jennifer to sleep because she is asking far too many questions, so this is a valid movie to save the explaining. However when they arrive Marty has to complete his mission of saying no to Griff, and Doc needs to run and errand in the DeLoren, we find out later this is to pick up Einstein his dog. My question is why did they have to remove Jennifer in the first place, her and Marty fitting in the DeLoren easily, why could Doc not leave her in the front seat when he went to pick up his dog?
|A safe place to leave a comatose teenage girl.|
|"We can't have you sitting beside a woman can we Einstein?"|
2/ Hoverboards and water are incompatible?
Now for start, let's presume that the hoverboard is possible (Incidentally here is a commercial about purchasing one). I imagine how it works is some sort of resistance with the ground, a downforce that allows the board to hover. The benefit of this design of wheels, is the lack of friction meaning you gain a lot more momentum for less energy.
The problem I have is the claim hoverboards don't work on water unless you have power. If you note in the photo below, Marty doesn't sink when he is above the water. He just can't gain forward momentum.
|By the way those shoes have Power laces! Awesome|
Given there is enough resistance to keep the board a float above water, why does Marty's pushing no longer work above water?
|He is pushing enough to cause a wave? But not to move.|
3/ How exactly do the flying cars work?
In 2015, we are all going to have flying cars, sweet! That's only like 4 years away. But how do the flying cars in this movie work?
|This is what a flying car looks like|
|Note the lack of wings|
So no wings, also note no rotors, so the flight is not achieved through helicopter methods either. Hang on a minute you say, they have hover boards can't they just make the cars hover too?
Well yes, they could make the cars hover a foot off the ground, maybe a couple of meters but the downforce required to get the car 200 metres into the air would be so powerful it would make walking around under flying car a health hazard.
|Rush Hour is a killer in 2015|
|Although this would now make more sense.|
4/ How does Biff know how to operate the time machine?
Let's just ignore the fact that Marty decided to just wander off from the time machine, their ONLY means of returning home, with both doors wide open. Forget Biff, Marty was lucky some street hood didn't just drive off in the car.
|If the doors look like this, the Delorean is NOT secure.|
|Just your standard time circuit right|
|"Oh S*** the pictures they are moving"|
Also from what I can gather Biff has washed cars his entire life, and doesn't appear to run a business, he just washes the cars, so probably not the most educated of people.
|It's not rocket science|
So this uneducated 70 year old man just climbed into a time machine,and worked out he needed to set the time circuits to his desired date, he also worked out he needed to get the car to 88 mph to go back in time. Maybe he just got that fast by driving normally you say. Have you see old people drive?
|"Hang on to your bonnet Mavis, I am taking this thing to 20 mph"|
5/ How did Doc not notice Biff's cane under the pedals?
Okay lastly after Biff returns to the future we see his cane break in the car, and the handle falls under the pedals of the Delorean. That's right the pedals, where you put your feet when you drive the car, not in the boot or under the seat where you keep your used fast food wrappers, and assorted CD's. Under the PEDALS!, so presumably Doc would have stood on it, as soon as he entered the car. Its not like it is inconspicuious its a Golden fist!
|"It took you 8 hours to find this?"|