Continuity mistake: In the scene where Sirius lies at the lake and Harry kneels next to him, Sirius seems unconscious, then opens his eyes in terror as he sees the Dementors. However, in the very next shot, which shows the two from above, his eyes are suddenly closed and there's no sign of movement in his face. Too big a change, too fast. (01:38:45 - 01:42:50)
nightline
3rd Jun 2004