That is an excellent point Elliot Templeton.

I remember the look on Tom's face,when he realises what the girl is doing up there and hears the girl's awful mother telling her that she was not to leave her room. Like you, I think inclusion of the scene in the original theatre version would have reinforced in viewers minds what a scumbag Woltz was.

Though it obviously would not have justified
the horse's head, it adds an important dimension
to this part of the story.