Jest

Jest acts as the 2nd-level wizard spell, fascinate, upon all hearing it. All creatures within the area that fail a saving throw vs. spell stop their activities and listen for the time required to complete the casting. An attack on a creature during this time negates the spell's effects on that creature.

Upon completion of the spell, stopped creatures receive another saving throw vs. spell. A successful saving throw means the creature merely walks away confused for 1d10 rounds unless attacked (which immediately negates the spell effect). Failure means that the creature is racked with laughter and unable to do anything but laugh for the next 1d10 rounds; also, if no attack is made on a creatures during the period of helpless laughter, it views the caster as having both a Charisma and Appearance/Comeliness of 20 for the duration of one full day.

Notes: Common in oriental settings for geisya (entertainers), rare for others; virtually unknown elsewhere, except perhaps for bards or jesters.