Agreeability gets you so far in life, but when the chips are down, it helps to lose your temper sometimes. That's a pretty unexpected moral takeaway for a kids' movie, and it's just one surprise of many in "The Angry Birds Movie," a fast, fizzy and frenetically entertaining extension of the manic gaming franchise that, at its zenith, had children of all ages glued to their smartphone screens. Establishing a basic psychological motivation for the fiery disposition shared by the feathered folk of Bird Island, this irreverent origin story takes an appropriately loose, elastic approach to its larger narrative, with frequent detours to fill in daffier details of its mad, mad, mad, mad story world.