23rd Oct: It's time for the second TV Tropes Halloween Avatar Contest, theme: cute monsters! Details and voting here.
The most common physical response to an in-universe Crowning Moment of Funny: a character gripping his stomach in pain and laughing hard enough to weep. Some characters may remain standing, others may roll around on the floor or have to sit down. Not related to Die Laughing...hopefully.
Examples:Anime and Manga