If you've seen the trailers or the posters for The Meg, you might have been distracted by the size of the shark, which is hard to get a clean look at. You see the fin sticking out of the water, but you can't quite grasp its scale. In certain shots, the shark looks about the size of a football field while in others it looks a bit like Bruce from Finding Nemo, right? Is this an incredible shrinking shark?
Partially, the discrepancy can be explained by a twist that occurs about halfway through the movie. (Warning: Very mild spoilers for The Meg follow.) The ragtag crew of shark-hunters, which includes an obnoxious sneaker-wearing billionaire (Rainn Wilson) and an oceanographer (Bingbing Li), manage to kill a big shark a little over halfway through the movie, and, if you're new to these types of stories, you might think our heroes will spend the rest of the film relaxing and trading one-liners on the beach. Unfortunately, that dead shark ends up being a different, smaller shark. The even bigger Meg soon emerges -- and it's not happy. So, in some parts of the film, you technically are seeing a smaller shark. A mini-Meg.
What that doesn't explain is how both sharks manage to be so sly. I'm willing to buy that sharks can move through the water with lightning agility and stealth dexterity, but the script continuously asks you to believe that a state-of-the-art research facility wouldn't be able to detect a 90 foot shark approaching and eventually biting its glass exterior. Even when the team manages to "tag" the creature with a tracker, they can't help but get spooked by it in subsequent scenes. It's like the Meg can render itself invisible.
Turteltaub stretches your credulity even further in the film's beachfront finale, which builds to the inevitable Statham vs. Meg showdown. By that point, the filmmakers clearly hope that you'll be laughing too hard to to care about the shark's spy-like maneuvers. But part of the problem with the film, which is both too overstuffed and too bland to make much of a lasting impression, is that it's not fun enough to silence all the goofy questions that will pop up in your head as you watch it. The only escape is to over-think it.