Continuity mistake: When Sister Helen is being pulled over for speeding, in the view through the rear view mirror, the cop car behind her is driving on the left side of the road, with the police officer driving in the right front seat, on a straight road with a solid center line. In the next shot, both cars are on the right side of the road, with the police officer sitting in the left front seat, on a curvy road with a dashed center line.
Continuity mistake: At the end we see Matthew strapped to the table. After his heart stops the straps over his shoulders disappear. (01:46:16 - 01:51:04)