Revealing mistake: When Jim is riding the bicycle through the empty hospital, the "Frigidaires" begin falling through the roof. One bursts open, dropping its contents onto the floor. Something from inside must have landed on the camera because you can see it jerk suddenly.
Trivia: When Jim returns home after losing his parents, his nanny slaps him. The actors had practiced a fake slap and fake reaction, but Spielberg and the actress playing the nanny conspired to make the slap real when the cameras were rolling, so Christian Bale's reaction would be genuine. Therefore, Bale is really being slapped, and his shocked reaction is no act.Krista