Place this clip right after the punchline or reveal in your edit, not underneath the dialogue before it. Follow it with the Nelson's Ha-Ha! Sound Button for a teasing second laugh, or precede it with a Sudden Suspense Sound Button to build the beat before the reaction lands.
About this sound
A just over two second clip of a person bursting out laughing, starting with a pfff exhale before spilling into a loud hahahaha. It feels like trying to hold in a laugh and failing completely, the kind of helpless, contagious amusement that makes everyone else start laughing too.