Place it just before the contest starts, after Round One Fight sets the stage and before Anime Punch lands the hit, so the threat becomes the bridge between the announcement and the action. Sudden Suspense works just before it when you want the challenge to carry more weight.
Über diesen Sound
This is a short two-second spoken line that delivers the threat 'I am going to crush you' as a direct, confident warning. It feels playfully menacing rather than genuinely hostile, with the emphasis landing on the challenge itself. That mix of bravado and humour makes it land best as a joke threat between friends, rivals or teammates before a contest begins.