Continuity mistake: When Tommy Lee Jones is testing Sally, she throws plastic canisters at the window in the interview room. Jones has one in his right hand which he wags back and forth. Brief cut to back shot of Jones, and he is drumming the fingers of his right hand on his left arm. Then cuts back to him wagging the canister.
Continuity mistake: When Sally is on the roof and sees her mom, Kathleen Turner's, hat is on backwards, she starts to scream, causing her mom to fall. She falls directly out of the window. When Kathleen Turner turns her hat back around, Sally starts walking back to the window, but when they show her walking back, her mom is several feet to the right from under the window.