Place it at the end of a short refusal scene, after the invitation has been shown on screen. Follow it with Bruh for a flat reaction, then Emotional Damage when the joke turns to the cost of staying home.
Über diesen Sound
This is a short German spoken line, lasting about 1.7 seconds, in which a voice calmly states that he is sitting in his bunker. It feels stubbornly unbothered and dryly funny, like a refusal to come out and deal with anyone. It comes from a Downfall version of the line, presented here as a meme clip.