Place it right after the boast peaks and just before the fail lands, so the insult frames the payoff. Build tension first with Sudden Suspense, let this line answer the brag, then close with Nelson's Ha-Ha! once the bluff is exposed.
About this sound
This is a short French voice line, lasting about 1.7 seconds, in which a speaker delivers the phrase 'Vous êtes un tigre de papier' with a calm, pointed tone. It feels dismissive and quietly cutting, like calling out someone whose threats sound impressive but carry no real force. The delivery lands as a neat verbal put-down rather than a loud insult.