creepy 70’s movie with child pushed by unknown person at end

i was looking for a movie from the late 60‘s or 70‘s.

i don’t know a whole lot about the movie,  i was about 5 years old and it felt very creepy. the main detail that has stuck with me all these years is the ending which had a young child walking down a large staircase slowly holding on to the heavy wooden bannister and stepping on each step carefully when out of nowhere the child is pushed from behind. we don’t see who did it just the shocked child’s terrified face and then they freeze frame on it and cue really haunting music.

kinda sounds like the melody of this song starting at 0:46 seconds only more just the horns and no back beat and haunting:

roll credits.

that’s all i got.

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