pop rocks is a kind of recreational snack food, and the carbon dioxide contained in pop rocks meets the thrust generated by thermal vaporization after entering the mouth, so that pop rocks particles can jump in the mouth. Pop rocks's selling point is that there are candies with carbonated gas in them, and there will be a crackling sound on the tongue.
emo space refers to a rock style, full name of which is emotional hardcore, and it is a subcategory of punk music. Later, this word generally refers to emotionality, which can be understood as "unhappy" and "depressed".