Revealing mistake: There is a glimpse of a bench on the porch landing, roughly parallel to the steps where Jake is sitting with his back at about a 45° angle to the railing. Front views of Jake show the bench oddly angled upward as though it ascends like the steps. (00:38:10 - 00:39:12)
Revealing mistake: The "horse" in the stall on the left has to be fake. With the exception of a barely visible half-blink, it does not move the slightest when the girl (while handling the reins) walks around its head, and a couple of girls are touching (pretending to be removing) the saddle. (00:29:25)
Revealing mistake: Boyd brought Dr. Mackles to the location where he escaped the police hunt. Meanwhile, he rummaged through the rest of the place. In a closet, he found a newspaper with an article that talks about the evil South African CEO. In the first paragraph, because the rest is filler text about a completely unrelated topic (the answer about an inheritance question from the advice column of the Moneywatch website). (00:58:50)
Revealing mistake: When Miller is stopped by police and looks into his side mirror, it looks like the police officer is coming out of the passenger side of his car. The front view shows the officer emerging from the driver's side, like he should be. (00:22:00)
Revealing mistake: Vivian talks on the phone as she walks towards the camera. A couple walks behind her in the opposite direction. A bicyclist emerges from the left-center side of the screen and heads straight across the path, perpendicularly towards the couple. The bicyclist "disappears" behind Vivian, just before he reaches (crashes into) the couple, and the camera cuts to Carol. Seconds later, Vivian still walks towards the screen, and a different person walks where the couple was. (00:14:38)
Revealing mistake: When the oil starts gushing, one can see a rectangle on the ground with different coloured grass, where the pumping mechanism to achieve the effect was buried.
Revealing mistake: The ship is being attacked by a megalodon. The USS King is supposed to be in open ocean. When three sailors run to the left, we can see the ship is next to a dock. (01:01:35)
Revealing mistake: Ian stands on the rooftop, with an elevated highway to the right of the screen, some distance from the building. The right-side rear view of Ian reveals the elevated highway much closer, practically against the side of the building. The CGI elevated highway's height compared to the rooftop also varies, being lower when Ian sits, and the support posts are not even flat against the underside of the elevated highway. (00:41:54 - 00:42:20)