Plot hole: When Sarah Paulsen pulls the necklace out of the water, the necklace clasp is obviously closed. Since the circumference of the necklace is too small to fit over the top of Anne Hathaway's head, why would anyone believe that it fell off her when she was running to the bathroom? The only way that could have happened is if the clasp (which we were earlier told can only be opened by a magnet) had opened. The trained security guards wouldn't have suspected something wasn't right about a closed necklace falling off over of her? They were following her. They saw that at no point did she lower her head on her way to the bathroom for the necklace to fall off over her head to begin with. It also could not have fallen off her when she was vomiting into the toilet in the bathroom since the clasp was closed. (01:18:25)
Plot hole: The entire plot hinges on the villain's gang obtaining the tablet that allows admin access to the building's systems. However, it can only be unlocked via facial recognition and it is keyed only to Will Sawyer's face. In fact, when they finally do get it, Xia unlocks it by holding it up to Sawyer's face. So what was the point of trying to steal the backpack containing the tablet? Without Will to unlock it, the tablet is useless.
Plot hole: Robert first shoots the electrical transformer on the pole's top, then enters the bakery, slices the wheat sacks and uses electrical fans to create a dust cloud for a dust explosion. How are the electrical fans supposed to work after the electricity is cut?
Plot hole: One of the bank robbers, a former soldier, Ray Merrimen just got paroled 8 months ago for a previous felony. This film takes place in California. Convicted felons are prohibited by law from touching or owning firearms. Merrimen is at a public shooting-range with CCTV shooting his firearm. The police officer tracking him since he's a suspect in a new string of former and recent holdups walks into the shooting-range and they just stare at each other. He could've been busted and sent back. (01:03:45 - 01:06:00)
Plot hole: Riley just could not hang the tree guys from the wheel by herself.
Plot hole: When Lisbeth's techie friend "Plague" sets up outside her childhood mansion in the van with the radar dish, no-one in the mansion notices this big van with a big radar dish pointing at the mansion even when one of the villains is able to find a lone sniper "Ed Needham" on a distant hill.
Plot hole: Waikiki is not supposed to know who 'Niagara' is and most importantly, he is supposed to think that the Wolfking and his men are there for him and Honolulu. Yet the moment the Nurse mentions that Nice is "with Niagara", his reaction is as if he always knew the Wolf King is a patient. (01:10:00)