Everyone laughs. It's how we make life fun. Because life is funny! While enjoying laughter is universal, no two laughs are alike. Types of laughs can have their own style, which can define the personality of the person who's laughing.
Hoo boy, this one's a doozy. The Knee Slapper laughs with such gusto that they can't be bothered to keep it solely to their face, they need to get their limbs involved. The laugh itself is boisterous and booming. But it is the active aspect of this laugh that makes it so special.