Why the candy seemed to support the story
Pop Rocks crackle because the candy contains tiny pockets of carbon dioxide—the same gas that makes soda fizzy. When the candy dissolves in the mouth, those pockets release gas and make popping sounds. That startling sensation gave the rumor a vivid hook: if the candy popped in a child’s mouth, people could imagine that adding soda would make the reaction dangerously stronger.
But the crackling is not an explosion. The gas is released as the candy dissolves; it does not build into the kind of pressure that could make a stomach burst. Soda adds more dissolved gas, but the ordinary result is fizz and, at most, a burp—not the catastrophe described in the story.
A rumor became a public-relations problem
The claim that a child had died after eating Pop Rocks and drinking soda spread as a warning to parents. Its emotional force mattered more than its plausibility: a familiar treat, a simple combination, and an alleged child victim made the story easy to repeat and hard for worried families to ignore.
The manufacturer responded with full-page newspaper advertisements to reassure parents that the reported death was false. That unusually public defense shows the bind created by a vivid rumor: even when a product’s basic mechanism does not support the danger, a company may have to explain the science in the same public arena where the story is spreading. The candy’s harmless pops had helped make the tale memorable; the ads were an attempt to make the facts just as memorable.
