I saw a movie years ago (early 2000’s-ish?). Definitely in color, possibly in English. It was a very surreal, dream-like movie and the only scene I can remember is someone (maybe female) walking through a room with a live horse in it. As the person walks past the horse, it’s suddenly sliced vertically into several sections. The sections separate from each other, staying in place in the air. It reminded me of an anatomy book diagram showing you where the organs are in relation to the body. The horse is still alive and doesn’t seem to have noticed what’s happened to it. In one of the sections you can see it’s still-beating heart.
That’s really all I can remember. To this day I’m still not certain if this was a real movie or simply a fragment of a dream I had years ago.