Fun (1994)

We see from the flashbacks that Mrs. Farmer let Bonnie & Hillary into her home where Bonnie picked up the knife then walked into Farmer, while the knife was raised, stabbing her in a frenzy. Later on she jumps off the roof of prison/looney bin in an act that is either suicidal or attempt to escape. Hillary stays with her until she dies. She is transfered to another prison, ending on her leaning against a wall...once again an outsider