What metaphors are used in Tales of the Cthulhu Mythos by H. P. Lovecraft?

Near the end of the tale, Lovecraft writes, "A mountain walked or stumbled," to describe Cthulhu's awakening. The metaphor of a mountain moving like a human suggests the vast scale of Cthulhu's otherworldly body, and also the lack of detail with which Johansen is able to describe its form in his diary, likening the monster to a massive geological structure.