So theres this scene in a movie where 2 women are holding knives and something kinda makes them just calmly stab each other to death and then they fall down on the floor and keep trying to stab each other until they both die. It’s not a major part of the plot at all but if I don’t remember this movie its gonna kill me.
I think it’s; Roommate Wanted 2015.
https://youtu.be/msBhzlxAVWs