Giant Monster Attack

In many a story, Giant Monster Attacks are a common theme, usually when it comes to the main antagonist (or a minor one) attacking a city, a place, or a ship for these reasons: Godzilla's attack on Tokyo is a classic, let alone the Giant Squid attacking the Nautilus in 20,000 Leagues Under the Sea, but there are many kinds of Giant Monster Attacks:
 * For sadistic amusement
 * To hunt down the hero
 * To claim a sacrifice
 * To lay a siege on a nation
 * Dragon Attack: Common in medieval fantasies, the dragon lays a siege on a kingdom or village, setting buildings on fire, kidnapping princesses, and ravaging the land until the brave knight shows up to defeat it.
 * Sea Monster Attack: A kraken or sea serpent attacks a ship, usually wrapping itself around it, dragging it down to the depths, and consuming the crew.
 * City/Kaiju Attack: A bipedal monster attacks a city, devouring civilians, crushing vehicles and tearing down buildings.
 * Super-Powered Form Attack: The main antagonist takes the form of a giant monster in the final climax when going through a breakdown and/or challenging the hero.

Examples

 * The Kraken, summoned by Davy Jones, tears down a ship with Will Turner on it and then brings down the Black Pearl.
 * Ursula transforms into a giant in a bid to control the Seven Seas.
 * Rowan North transforms into a ghostly giant monster to seize power over New York City.
 * Mor'du attacks the Highland clans and nearly devours Merida until Queen Elinor arrives to save the day.
 * The Giant Squid attacks the Nautilus, capturing one of the seamen and fighting the main characters.
 * The Kraken (Clash of the Titans) attacks Ethiopia, terrorizing the country and preparing to devour Andromeda until Perseus arrives to save the day.