Mom Throws Doll At Thing Coming Out of Floor in 70's Film

by Carrie
(Pacific, Missouri, USA)

I remember a 70's horror film with really intense music about something trying to break through the floor in a little girl's room.

It's in the corner of the room and the carpet is pushing up. The mom tries to protect her little girl and throws a doll at it (after drawing a moustache on the doll?).

Does this ring any kind of bell to you? Thank you.