I wish this episode had gone on longer. There was so many crazy aspects to this movie that I think you guys could have easily talked for 3 hours about it.
1) I highly doubt that old taxis in New York are self-driving. Certainly not that many.
2) I don't think you can remote start a car that is turned off. If there's no power running to the car, how would she control them? You can't hack into a computer that isn't running, so why would this work on cars? Unless she somehow got control of all of the remote activation frequencies? But those only work within 50 feet or so of your car, and she was much further away than that.
2b) Couldn't the cars with people in them just turn the power off to stop them?
3) Did Jeep Grand Cherokee PAY for that product placement? If so, that is a weird marketing choice. To have a remote controlled death machine that can be hacked into and controlled by someone else (as this movie will have us believe) with your brand labelled on it, doesn't seem like a great way to inspire confidence to potential consumers of that vehicle.
3) How did she know the cars would "rain" down? There isn't an altitude sensor in GPS, is there? Those cars could have just as easily been at street level and her comment would have made no sense.
4) That EMP pulse supposedly knocks out electrical equipment, but then there is a ton of electrical equipment, including a helicopter in that base that they immediately start to use, so that EMP seemed pretty darn selective.
5) That submarine was mounted up on dry land. How the hell did she even launch it that quickly?
6) Water is a lot more dense than air, so I have my doubts that a submarine could build up as much speed as those cars, and certainly not in such a short distance, to be able to chase them. If you google "how fast can a submarine go?", the top result says:
This is why, even in 2014, most submarines and torpedoes can't go much faster than 40 knots (~46 mph). Higher speeds are possible, but it requires so much power that it's not really feasible (torpedoes only have so much fuel).
7) Charlize Theron's character's whole motivation was non-existent. She wants "them" (who?) to know they will be held accountable (to whom? to do what?) The woman needs to sit down and write out a mission statement.
8) If you blow up a submarine with nuclear material on it, that is very much still a nuclear catastrophe. Tyrese is right; they should get the hell out of there.
9) Why did they even bring Ramsey into this franchise?! She's supposedly one of the best hackers on the planet, and yet she's constantly having tech mansplained to her by Ludacris (who was just a mechanic in the 2nd movie) and then by freaking Jason Statham in this one. REALLY?! They made Jason Statham come up with the brilliant plan to use the program that Ramsey herself built?! And then Ramsey just says "oh that's brilliant" or whatever. That is bananas.
Don't get me wrong. Still thoroughly enjoyed the movie and can't wait until it comes out on blu-ray and I can watch it again, but this movie made even less sense than Furious 7.