Hape Kerkeling is one of Germany's best known comedians, actors and television presenters, famous for playing larger than life characters and playing with regional accents and dialects. Isch glaube es nisch turns standard German disbelief into dialect comedy, and that mangled pronunciation is exactly what made the line quotable beyond television. Shared as a short audio clip on German soundboards and in group chats, it survived as a standalone reaction, understood even without the original sketch context because the tone alone signals total incredulity.