Place it immediately after the suspicious claim or offer, then follow it with Zu Risiken und Nebenwirkungen for a second German line, or cut to You What when you want the doubt to land harder. Keep it as the punchline of the exchange, not as background.
Über diesen Sound
The clip is a short German spoken line from Arno Dübel, lasting about four seconds, delivered in his flat, matter-of-fact voice as he says the phrase in the title. It feels dryly amused and slightly smug, like a small compliment offered with a knowing pause. That deadpan delivery makes the line land as a wry reaction rather than a straightforward remark.