In The Order of the Phoenix, Harry casts the Cruciatus curse at Bellatrix Lestrange after she kills Sirius Black. She's knocked off her feet, and before she gets back up, she is shown to be whimpering and backing away from Harry.
Does she fear him in this moment, even for a second, or is she just toying with him?
Later, she laughs because she knows he doesn't have what it takes to torture her. In the book, she gets back up, essentially unfazed. It seems to be purposefully played a bit different in the movie, so my question is specifically for what we see in the movie.