Revealing mistake: When Sweet Pea, Rocket and Blondie are sitting in front of their mirrors and discussing how Babydoll saved Rocket from the cook, the camera starts behind them, pans to the left, through the mirrors and out the other side. Before the camera passes through the mirrors, if you look closely at the girls' backs, you can see that they are slightly out of sync with their 'reflections'; it is obvious they used doubles to sit with their backs to the camera and copy the actual actresses.
Sucker Punch (2011)
1 revealing mistake - chronological order
Directed by: Zack Snyder
Starring: Scott Glenn, Carla Gugino, Oscar Isaac, Vanessa Hudgens, Abbie Cornish, Jena Malone, Jon Hamm, Emily Browning, Jamie Chung
Continuity mistake: Before killing the baby dragon in its nest, Babydoll places her machine gun on the ground in front of the nest. But once she kills it and the mother dragon forces them to flee, the machine gun has disappeared.