History WMG / BackToTheFuture

* Any of them. Biff's gang (and Biff himself) would have been exactly the right age to serve in TheVietnamWar, so it's certainly possible one of them came back with a Vietnamese wife, and if his kid married an Asian-American he could have easliy ended up with an Asian looking grandson.

* So whose grandkid is Whitey (the Asian guy who says "Unless you've got powah!")?

** So whose grandkid is Whitey (the Asian guy who says "Unless you've got powah!")?

Spike (the girl in Griff's gang) even has a slight physical resemblance to Biff's lackey Skinhead ("get a load of this guy's life preserver").

We saw how outraged Biff was to be charged $300 to clean and detail his car after crashing into the manure truck in 1955. (Running that through an inflation calculator, it comes to over $2,300 in today's currency - no wonder he was so angry!) Obviously this experience stuck in his mind for a long time (he still remembers it when he travels back from 2015) and the fact that it was so expensive gave Biff the idea that detailing and repairing cars was a good way to make money.

All Marty says is that was an oldie where he comes from. Perhaps in the original timeline, it was a different artist's song, which Marty then gave Chuck Berry the idea for.

The stock DeLorean takes 10.6 seconds to get from 0 to 60 MPH, and 40 seconds plus a LOT of room to get up to 100. Doc had to include a lead-lined chamber for the plutonium, which must have added significantly to the car's weight. With the stock engine and that much extra bulk, it might not even have been able to reach 88 MPH at all. So he replaced it with a much more powerful engine from a sports car. That explains why the engine noises don't match those from a normal DeLorean.

The stock DeLorean takes 10.6 seconds to get from 0 to 60 MPH, and 40 seconds plus a LOT of room to get up to 100. Doc had to include a lead-lined chamber for the plutonium, which must have added significantly to the car's weight. With the stock engine, it might not even have been able to reach 88 MPH at all. So he replaced it with a much more powerful engine from a sports car. That explains why the engine noises don't match those from a normal DeLorean.

* If Doc was committed, he would never have built the time machine, and never allowed Biff the opportunity. So he would have never changed the timeline and Doc would have succeeded in building the time machine and allowed Biff to travel to the past, causing Doc to be committed... and so on. This is what the movies call a paradox.

** It may have something to do with Doc M being created some fur years ''after'' Biff changed the future.

* You think a being like Dr. Manhattan wouldn't have something to say about a figure like Biff using an object clearly not meant to be present in this stage in time?

** WHERE'S MY HOVERBOARD?!

** And 47-year-old Marty is pretty depressed.

Biff comes back out of the time machine in 2015 and disappears, but the neighborhood doesn't. Hilldale, for instance, was built in 1985 as a nice neighborhood. In 1985-A, it wouldn't have been built altogether. Furthermore, if Doc was committed, he would never have built the time machine, and never allowed Biff the opportunity. Marty and Doc were destined to succeed at saving the future.

Evidence: he activates "lithium mode" on a panel, and [[http://en.wikipedia.org/wiki/Lithium_pharmacology lithium being used as a tranquillizer]] is TruthInTelevision. The lithium mode he activated was probably lithium being added to their drinking water, which is what psychiatrist Peter Kramer proposed in reality in 2009 to reduce suicide rates.

He says he got his colon and spleen replaced and his blood changed, and that treatment added 30 to 40 years to his life. This is because Doc used to have a colon tumor (more common in old people) that metastatized to his spleen, so the future doctors had to replace those organs to remove the tumoral masses. And they changed his blood to flush out the remaining tumoral cells that circulated through his body.

<<|WildMassGuessing|>>

Even though we already have some rudimentary form of [[http://www.terrafugia.com/ flying car]] and [[http://www.youtube.com/watch?v=W4N-CLPXF8w hoverboard]], by 2015 they will not be as advanced and ubiquitous as they were depicted to be in [=BTTF2=]. On the other hand, information technology marched much faster than what was shown in [=BTTF2=], and pretty much every electronic device we have can be connected to the internet (which was implied not to exist in [=BTTF2=]). This is because another time traveller, who used his own time machine to change the timeline for his own purposes (just stealing the Delorean for it would result in a time paradox, because it is equipped with technology from a future this action would cause not to exist). More precisely, he went back to 1989 and invented the World Wide Web as Tim Berners-Lee. This caused information technology to progress with unnatural speed, while at the same time slowing down to a crawl every other sector of technology.

[[WMG: Marty suddenly hating when people call him a chicken in the sequels is related to him resolving his previous character flaw of being afraid of rejection.]]
The catch, however, is that Marty didn't just resolve the character flaw; by helping his father gain self-confidence back in 1955 before he was even born, Marty completely- and subtly- erased this flaw from existence. Because this meant that he didn't learn anything from it, the new Marty [=McFly=] now has a different character flaw- namely, one where his overconfidence won't allow him to refuse any dare thrown his way, hence, his aversion to being called a chicken.