Place it at the end of a comeback sequence, just after the turning point, with Sudden Suspense building tension before it and Nelson's Ha-Ha! answering it afterwards to extend the takeover.
About this sound
A short spoken line claims the steam, then breaks into a loud whahahah laugh that stretches the joke into a full takeover moment. It feels gleeful, cocky and deliberately over the top, like someone celebrating a win they have been waiting to steal. The delivery makes it easy to picture a cartoon villain or a gamer finally turning a match around.