Some of these pictures and descriptions may give away plot details that you might not want to know before watching the film.
This is a made for Netflix black comedy/crime film. I was liking it just fine until shortly before the end they randomly tossed a snake into the action. Fortunately, I very much enjoy seeing unnecessary snake scenes in movies.
The plot is basically this - a depressed anxious woman named Ruth comes home to discover her house has been robbed. She tries to recover her stolen things and chase down the people who robbed her, which gets her into all kinds of trouble. Finally, she is knocked out and kidnapped and forced to participate in what turns out to be a violent, bloody home robbery. Eventually she escapes into the forest, chased by Marshall, one of her kidnappers and a really bad guy, who is shooting at her. When running away from him through the forest, Ruth falls into a shallow pond, then picks herself up, but a snake starts swimming towards her, as if she isn't already in enough danger from an armed psycho. But the snake only swims past her and crawls out of the water onto a large fallen tree. Usually, a snake in a movie is like a gun in a movie - if we see it once, it will almost always return to attack someone, and that's what happens here. Ruth hides behind a tree uphill from the pond while Marshall stops next to the pond beside the fallen tree, having run out of bullets. They yell at each other, then he slowly walks uphill towards her, wielding a knife. She moves out from behind the three and throws rocks at his head making him roll downhill and fall into the water. Out of nowhere, the snake jumps on Marshall. That's what snakes in movies do, not so much in real life. We hear Marshall cursing and screaming as Ruth runs away. Moments later we learn why he was screaming when we see that the snake has bitten him and is hanging from his face by its fangs. (That image might have made the whole unnecessary scene worthwhile.) After that we see Marshall one more time, still alive, but crawling on the forest floor with a swollen face, howling in agony.
The snake we see at first is a real cottonmouth, swimming next to what is probably a fake torso. Then we see an apparent CGI snake swimming around Ruth. (Even if it is a live snake, it's not a cottonmouth.) Then we see the real cottonmouth again, swimming towards Marshall. Then we see what must be either an artificial snake somehow stuck to his face or a dead watersnake. It does look very realistic if it's a fake. I will give props to the movie for partly using a real venomous snake instead of a harmless stand-in, but shame on the movie for showing a snake found in the humid Southeast in what is obviously a forest in the rain-soaked Pacific Northwest. The film was shot in Oregon, but we are never told where the movie takes place. I don't know if we're supposed to believe the forest is in the Northwest or the Southeast, but I'm sure most viewers are not bothered by the incongruity.