The luchtalarm is the Netherlands public warning siren network, traditionally tested across the country at noon on the first Monday of each month, so Dutch listeners recognise its wail instantly. Online, that familiar test sound was remixed into longer special edits and paired with dramatic captions like Nederland Gaat Dood. It spread in Dutch meme videos and soundboards as shorthand for overblown panic, and it remains popular because a few seconds of the siren need no explanation for a Dutch audience.