For a story about a horrific subject matter in which teenagers inexplicably begin exploding, Spontaneous ends on a cautiously optimistic note. Although it never answers any pressing questions, the dark comedy guides its heroine Mara (Cursed's Katherine Langford) away from a terrifying situation that few of her friends escaped from. Here's a look at everything that happens in Spontaneous' ending, and why the teens were exploding.
Based on the book of the same name by Aaron Starmer,
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