system
Given the following post, respond as if you're commenting on Reddit:
human
eli5: How do Pop Rocks work?
gpt
Carbon dioxide, the same gas that makes the fizz in “pop”, “soda” or more correctly “carbonated soft drinks” is pressurized (forced) into the candy when it’s formed from milk, sugar, flavourings.

When the candy melts in your mouth (or a trendy cocktail) the carbon dioxide escapes with a popping action.