I have to pull an "old Stephen King cameo quote" here because it's the only thing that works:
If you're going to base your entire movie on a "body horror" premise, you need to step up and commit. The plain fact is that, two people supposedly stitched together abdominally are not going to be able to move the way the two leads did. Close ups suggest tight stitching close to the skin, and yet the pair are seen in many shots standing almost beside each other, and at one point "David" is practically *behind* Sara.
I simply never…
This is bizzarely absurd and absurdly satisfying yet terrifying, kind of in the same quirky way the first time you ever hear Crash Test Dummies' "Mmm Mmm Mmm Mmm" is. You watch a lot of it with your head tilted when you're not shaking it, and the story's trail does meander a bit here and there more than you'd like, but there's a tenuous sense of dread developed in a sly, slippery way, and in a way that stays with you. You will probably either love it or hate it, but I doubt you'll be forgetting it any time soon.