During The Hollywood Reporter’s Q&A, Susan Sarandon revealed that a scene she edited would become the catalyst for the film. In the script, when Louise shoots her rapist outside a roadside bar, she wields a .38 pistol like a trained cop. Sarandon believes the character won’t hold a gun that way. “And I feel that this person has been raped, and is trying to figure out why men feel this is okay when they have moms and sisters, and why they say things to women in such a way that they don’t. this way?” So in the movie, her character shoots the man with a gun in one hand, and her hand shakes as her face takes on a range of emotions.
Then, during the climax, heavily armed police cornered the duo near the edge of the Grand Canyon. They can surrender or open fire. Instead, Thelma spoke to Louise from the passenger seat of the Thunderbird. The friends tearfully kissed, and then held hands as Louise pushed them off the presumably dead cliff. Initially, Scott wasn’t sure how to end the film; he came up with the idea for Louise to kick Thelma out of the car before she drove off the cliff alone. Basically, Sarandon had told him that Thelma and Louise go together, they will die together. “And that’s when I said to Ridley, ‘I want to cut a lot of this dialogue,’ and at that point we ended each other’s sentences, and I wanted to kiss her, and he said, ‘Great! ‘”
Personally, I just wish they had made it to Mexico. But considering that the friends went through everything together in the movie, it made more sense for them to hang out together instead of letting Louise kick Thelma out of the car.
https://www.slashfilm.com/1037062/how-susan-sarandon-helped-ridley-scott-shape-the-story-of-thelma-louise/ How Susan Sarandon helped Ridley Scott shape the story of Thelma & Louise