Place it as a punch at the end of a setup, after a build-up sound such as Tung Tung Sahur, then follow it with Sigma Boy to keep the meme energy going without letting one reference overstay its welcome.
Über diesen Sound
This is a very short, pitch-shifted vocal clip built around the number 67, delivered in a squeaky, baby-like voice created with a voice changer. It lasts well under a second, so the number lands as a sudden, playful jolt rather than a line of dialogue. The effect feels silly, knowing and deliberately childish, like an inside joke shared with people who already recognise the reference.