The Doom Generation
(1995)

Amy (Rose McGowan), Jordan, and Xavier find a place to stay in what looks like a garage (it's basically just a mattress on a floor). They have a threesome. In the middle of it, Amy takes a break to go to the bathroom.  While she's gone, Jordan and Xavier are about to continue on their own when suddenly Neo-Nazis appear in the garage. They tie up and gag Amy, who the honcho proceeds to rape. Then, using garden shears, he cuts off Jordan's genitals.

Amy manages to break free of her bonds, grab the shears, and kill the honcho, and probably the others too.

In the next shot, Amy is driving in the car with Xavier in the passenger seat; Jordan did not survive the attack. Xavier offers Amy a Dorito, but she just stares ahead, expressionless.

Thanks Yitz!