Continuity mistake: When the monster puts down Hanso after she tries to escape, you can see her footwear is completely dirty, but in the next shot where the monster's tail uncoils itself from her body, you can now see the pink and white of her footwear that you couldn't see before.
Park Hie-bong: In a word... her birth was an accident, and so was her death. Old people have always said... that an animal which kills a human... should be torn limb from limb. That it's a human's duty to do so. Until I slit that beast's stomach... and at least find Hyun-seo's body... I'll never leave this world in peace.