In my world, a 16 year old boy has gained ghost-like properties, invisible to the naked eye and able to flit through objects as if they were not there. Like a man trapped in a room with an endless expanse of stark white tile, with projections showing him what's happening in the world around him. He passes right through the holograms, but in this story, the boy is technically still there.
When his feet reach grass, he starts free falling to the Earth's core and swings back and forth until he is resting in the exact center of the core.
My question is this: If the boy was suddenly able to interact with the environment once more, what would happen? He is technically taking up the space that the core is, so he would most likely displace it, and I was thinking that maybe, like a gopher's tunnel, there would be an impression in the earth directly above him that looks like his body, because he doesn't instantly get incinerated by the sun. Would this be plausible?