Factual error: In the opening scene Addison and Pete are running on treadmills side by side. They are seen increasing their speeds to 8 mph and above. Addison even had hers to 10.1 mph yet they are both still talking, smiling, and laughing easily. 10 mph is a very fast speed for humans and they would not be able to laugh or even speak at those speeds.
Continuity mistake: While walking into the church Sam and Naomi discuss their sexual encounter "the day before." The day before when the encounter took place Sam had bruises and cuts on his face from being pistol whipped by the pregnant robber. There's no way he could have healed completely overnight.