Continuity mistake: When the lorry is braking, in some shots it is jack-knifing, and in others it's braking straight and true. (00:08:05)
Continuity mistake: In the opening scenes where the are driving home and the right front tire goes flat. Just before the Big rig truck hits them you can see that the tire is not flat. (00:07:50)
Revealing mistake: When the woman is taking the pictures at the start, the camera lens has got the cover over it. (00:07:00)