Hollow earth is an ancient subterranean ecosystem deep within the Earth, close to the planet's core. Its gravity is unique and inverts at a halfway point, allowing Titans to walk freely on both floor and ceiling of the Hollow Earth without fear of falling from one to the other. It is surrounded by a gravitational-electrostatic "membrane" anomaly inside the Earth's mantle.[1] The ecosystem continually radiates radioactive energy, allowing the creatures that inhabit it to evolve to titanic sizes. A fortress belonging to Kong's species also exists there, with a throne once held by his ancestors. You are a creature that is half human and half Titan. Previously you were a Titan with a form of your choice living in the Hollow Earth, but now you live on the ground in human form for unknown reasons. So what Titan are you