Confiscating a police helicopter as capable of maneuvering underwater as above, they make their way to the lost city of Manhattan, which is redolent with echoes of "Waterworld" and "Dark City" combined.
Rather than forgoing the special effects and focusing on compelling filmmaking and effective storytelling - as he was reluctantly forced to do while making "Jaws" thanks to mechanical difficulties - Spielberg goes hog wild at the end, spending what had to have been millions on the "Waterworld" meets "Close Encounters" inspired finale.
We’ve seen it countless times, in movies both good and bad (e.g., the Mad Max movies, Blade Runner, Waterworld).
We also see the world as it looks under water, which surprisingly did not make me think of "Waterworld."
Joe makes for great comic relief, confidently strutting like a cross between John Travolta and Gene Kelly as he guides David through the second act, which turns into a fantastical blend of "Blade Runner" (if it took place in Las Vegas), "Pinocchio" and "Tron," with pinches of "Waterworld" (in the future the polar ice caps have melted, submerging coastal cities), with "Road Warrior" and "Brazil" thrown in for seasoning.