Continuity mistake: The shape and width of the scar on Stuntman Mike's face slightly varies between the scenes (from thin in the shot where he is pouring some eye drops into his eyes, to almost invisible during the scene at the parking lot in front of the shop in Lebanon, Tennessee, and wide during the final rush).
Deliberate mistake: At the end of the movie, where the girls chase stuntman Mike, they drive the upper dusty road. When their car is shown front outside angle, there's a lot of dust rising from the camera crew's car. But when the camera angle gets into their car and shoots strait ahead - the dust is all gone, the air is perfectly clear.
Continuity mistake: The damage on the white Dodge Challenger varies between the shots. The most obvious is the right side of the car. We can see the whole right side is scratched (in the shot, where Mike is pushing Dodge off the road for a while and it makes 360°). But only a few moments later it looks like brand new (in the shot where Abby ask him to leave them alone). Then it is scratched again (in the shot where Mike says that Zoe would fly), nice again (in the shot where Zoe gets in with the metal rod) and to the end of the chase scratched again. (01:35:50 - 01:40:00)
Factual error: The second part of the movie is supposed to be located near Lebanon, TN, however, it is fairly obvious the terrain is Southern California. I realize that movie companies often use different locations to film than what they really are, but the landscape between CA and TN is vastly different.
Other mistake: When Mike rams up the backside of the challenger, the girl driving the car loses control and turns hard towards the left, the front tires aren't pointing forward down the road so there was no way she would have recovered from this. In the following shot after her closeup she's driving straight. (01:33:40)SoulGrind
Continuity mistake: When Nate and Butterfly are speaking on the porch in front of the bar and grill, the "bright red umbrella" he has is one of the large full size ones. When they return inside to join the rest of the group, when Butterfly says she had to get something from the car, the umbrella that Nate is holding is a smaller one. (00:21:20 - 00:24:40)