The phrase que me parta un rayo is a well known Spanish idiom used to swear something is true or to react with exaggerated disbelief, similar to may lightning strike me in English. As a short voice clip it has circulated on soundboards and in chats as a ready made reaction, especially among Spanish speaking users sharing funny audios. Its appeal is instant recognition: even without context, the dramatic delivery signals shock and joking honesty, which is why creators reuse it for memes, edits and group chat replies instead of recording their own line.