The Night of the Hunter (1955)

Directed by Charles Laughton.

Night of the Hunter is one of the most thrilling, terrifying horror films I've ever seen and when you dig deeper into the story and its origins it all starts to make sense.

In a key scene in the film, the children escape Powell on a riverboat and as they float away, the boy collapses unconscious on the boat and the girl (whose voice is dubbed by the singer Kitty White club) begins singing a haunting lullaby by the film's composer Walter Schumann).

As the boat floats along the river and the lullabies sing, they pass lily cushions and foxgloves, a frog watches from the shore, and you can almost drown in the sadness of it all.