Place it at the punchline of a singing fail edit, after the attempt and before the reaction shots. Follow it with a laughing dog meme button for a second wave, or precede it with Nelson's Ha-Ha for a quick mocking lead-in.
關於此聲音
This clip captures a young man who builds up to sing, lets out a drawn-out ooohhh, then completely loses it into loud hahahahaha laughter for several seconds. It feels gleefully unhinged and contagious, like watching confidence evaporate the instant someone tries to perform seriously and fails.