MonkaS comes from Twitch chat culture, where viewers spam the sweating Pepe the Frog emote during tense, awkward, or potentially disastrous moments in a stream. Editors later began pairing that feeling of nervous anticipation with dramatic sound cues, and thunder became a natural fit because it signals danger without needing any dialogue. The combination spread through gaming clips, reaction videos, and short-form edits, where a single crack can set up a fail before it happens. It remains popular because the joke is visual, audible, and understood instantly by streaming audiences.