I think that crawling out of your hat is musch less of a match to the flavor of the ability than having the hat-bearer placing your hat on your corpse/ashes, although being sillier, it DOES match the overall flavor of the prestige class better. You also want to be sure that the time the hatbearer is holding your hat doesn't count as being hatless (although there should also be some limit on it). I also note that the class might have to be extended to 10 levels to make that possible as a CAPstone.
EDIT: Hat Frenzy is mentioned in the last sentence of "Nize Hat" but isn't explained anywhere.