“The cat whom you tried to lift was no cat. That was Jormungundr, theMidgard serpent, the snake who goes around the center of the world. It isimpossible to  lift  the  Midgard  serpent, and  yet  you  did,  and  you  evenloosened a coil of it when you lifted its paw from the ground. Do youremember the noise you heard? That was the sound of the earth moving.

Thor’s Journey to the Land of the Giants