Grandmas Head Rolls

by Suzanne Heisman
(Great Falls, VA)

Does anyone know about a horror movie, from the early 60's, where the young girl greets her grandmother coming down the stairs in an electric stair chair, the chair jerks to a stop and the grandmother's head rolls down the stairs? I thought the name of the movie was "Hilda", but I can't locate it anywhere. It scared my brother and I forever!