Stupidity: The movie takes creative liberties with the real story; it's understandable, for instance, that it would show Paige being directly on NXT rather than part of the Florida Championship Wrestling promotion first, and that she is the only real character from NXT depicted in the movie. However, the movie chooses also to omit the fact that Paige was NXT Champion when she faced AJ Lee. Not just that, but it alters entirely the dynamic of the actual match; she does not manage to utter a single word because of stage fright, something that movie-wise she seems to have never managed to overcome. Given the changes, the movie asks us to believe that WWE would make a champion out of a complete rookie who is a deer in the headlights in front of a crowd that ignores her and hasn't found her personality yet - she does so only after she wins. That doesn't make a lot of sense even by the movie's own logic.
Stupidity: Early in the movie, AMMO and its crew show remarkable prudence in their approach to the drug deal, and a point is made about them following procedure, planning accurately using technology and trying to minimize collateral damage. The sting at the club goes against all of that. At the end of the day, it just consisted of getting close to the target and pulling guns on him in the middle of a crowd of civilians, the exits of the place (the front door even) completely unguarded.
Stupidity: Rescuing Manfred and Diego from the giant carnivorous plant, Buck could have cut both wires simultaneously to avoid that unnecessary horrible potential outcome of cutting the wrong one. The wires were stretchable enough for them to have been held together to then get cut at the same time. (00:37:40)
Suggested correction: Cutting both wires simultaneously would probably cause a different effect. Besides, Buck isn't very intelligent.
Stupidity: When Alice opens the door for the dumbwaiter, how did she not see the bottom of the elevator was removed when she was looking right at it? She even realised it was missing as she was getting in, but she still let go and fell to the basement.
Stupidity: When Ruth goes to see Madame Arcati, after Elvira has arrived, the kettle on a gas two-burner hotplate is whistling, so Madame Arcati takes the whistle off the kettle and then the kettle off the hotplate and pours most of the water into a teapot, but, what is stupid is, she puts the kettle back onto the same burner without turning the gas off and in less than a minute the water is boiling its head off but they don't notice because the whistle is on the table and not where it is supposed to be, on the kettle.
Stupidity: There is no way Mr. Mertyle did not hear the fence in his backyard crash to the ground; there's also a likely chance he could hear his dog crying and Smalls saying the dog is hurt. Even if he could ignore the sounds of other attempts to try to get the ball back; with the fence coming down where his dog lives and the chances of an injured pet it seems far too unlikely he wouldn't have rushed straight to the backyard hearing this.
Stupidity: During the ghost chase montage, why would Velma look for her glasses with her hand in midair instead than on the ground? No matter how nearsighted you are, the closest wall, or obstacle, is meters away and you'll never find your glasses anywhere but the floor. She does it for a longer time than anyone would. (00:52:40)