At around 12:20 minutes into the movie, Nacho(Jack Black) is eating toast in a room with the nun. A little bit before he talks about his parents, the camera switches from Nacho to the nun a few times, and the first time, Nacho's toast is around 1/4 eaten, when it cuts back a second time, it's 3/4 eaten with a piece hanging off of it, but he's always on the same bite with each camera change. When the camera changes back to him a third time, the toast is back almost complete.