Place this clip right after the reveal or failed attempt in your edit, not during the build-up. Start the sequence with the oh my god wow reaction, follow with this laugh, then close with Nelson's Ha-Ha for a second beat from another angle.
Über diesen Sound
This is a roughly three-second clip of a person bursting into loud, unrestrained laughter, spelling out as a rapid ahhahahah with no words in between. It feels gleefully over the top and a little mocking, the kind of laugh that makes a silly moment feel even funnier and leaves the listener grinning or cringing.