Thought people here would like to know about a brief belly inflation in the movie Until Dawn (2025). Ji-Young Yoo's character has been afflicted with a spontaneous explosion curse which is affecting her slowly; around the 50-minute mark, her stomach painfully swells, then ruptures.
There are a lot of clips of this on YouTube. I just realized that the actress is the voice actor that plays Zoey in KPop Demon Hunters.