Continuity mistake: When Sheriff Cobb loses his leg, Allison looks down and we see his leg back from the edge of the hole. The camera moves and we see his leg right next to the hole.
Continuity mistake: When Jack and Zoe are walking into town, the camera is behind them and there are people walking on the sidewalk towards them. The shot changes to alongside them, then when it cuts back the people have vanished.
Other mistake: When the parents freak out about Brian being missing, the back of the camper is shown, as is the part of the camper that's missing due to the distortion sphere. But it doesn't make sense; there are some parts of of the camper that shouldn't be there, mainly the one piece above the ground, where the sphere scorched the pavement but left the camper's end right above it completely intact.
