Shallow Hal (2001) - 5 major mistakes

Continuity: When Hal's co-workers bring him a cake for his promotion, Rosemary takes a slice out for herself. They change shots a couple times, and the size of the piece missing from the cake changes several times.

Continuity: In the scene where Hal and his best friend are having a chat at the bar, Hal's best friend's beer refills after every scene when he takes a drink of it.

Continuity: In the scene where Hal is confronting the two guys that made fun of Rosie he points to Rosie outside the restaurant and her shoes change from brown and black clogs (which is what she was wearing throughout the scene) to a plain black slide. Watch, it is totally obvious because they show her shoes several times before they suddenly change.

Continuity: At the DoubleDoor Inn, where Rosie is seen dancing with the guy with spina bifida, we see the other guests applaud and approach them once they have finished dancing. And if you look closely you will see that Hal joins the crowd at the right hand side of your screen. But as it cuts to the next shot where Rosie is walking away from the crowd, we see Hal catch up with her from the opposite side where he was standing with the crowd.

Revealing: At the end of the film when Hal and Rosemary reunite, Rosemary hugs Hal. In one shot, you can see Paltrow's thin hands, and beneath her shirt sleeve, the end of her fat suit's arm.