Cat People (1942)

In Jacques Tourneur's low-budget supernatural thriller:

• the kitten-faced young bride and Balkan artist Irena Dubrovna (Simone Simon) who was haunted by her inner demons, and when incensed could become a deadly black panther - in one scene, clawed the sofa with her nails
• the two frightening, jealousy-caused, feline stalkings of rival female Alice Moore (Jane Randolph) for her architect husband's (Kent Smith) attention:

Two Feline Stalkings

(1) - Alice's spooky night walk on a Central Park path who sensed she was being followed; as she departed from the park there was an unexpected hissing sound and shape - causing audiences to jump in fright (a bus pulled abruptly into the screen, accentuating the tense and suspenseful scene with the hissing and squealing of its air-brakes)
(2) - a second similar scene in a YWCA indoor swimming pool when Irena terrorized Alice - accompanied by growls and shadows of a black panther

• the film's aftermath including the fate of psychiatrist Dr. Louis Judd (Tom Conway) after kissing Irena