Continuity mistake: At the beginning of the movie, when Ann calls Matt to her house and they are about to make out, Matt grabs Ann with both hands by her throat. The camera shows both of them in profile with their faces very close together. When the camera view changes to from behind Matt they are much farther apart.
Continuity mistake: In the scene when Denzel and his on-screen wife meet up in the car after being on the hotel, it's raining. As his wife stands outside of the car we can see rain on the window, but as the shots changes no rain is seen. Also you can see blue skies and grey skies in different shots in the same scene.
Continuity mistake: When Denzel Washington enters the hotel room to see a murder suspect, you can hear the TV in the background. The movie "Legally Blonde" is on. You can hear Warner in the movie say, "I need to stop dicking around.." then, Denzel is attacked by the suspect & they have this huge fight scene on the balcony. Then, Denzel comes back in and you can hear the TV again and you can hear Elle in the TV say, "so when you were dating me, you were just dicking around?" The fight scene must have taken 15 minutes and that line comes immediately after the first line you hear.