Continuity mistake: When Cassie finds the note that says "Eat!" on it, the appearance of the handwriting of the word changes when she sticks the note on the bus window.
Continuity mistake: When Cassie is in her baby brother's room, the rate at which the mobile hanging over the cot is spinning at, changes a few times.
Continuity mistake: When Cassie is being interviewed by the blonde doctor, the buttons on the stop-clock keep on changing from up/down, between shots.