Or the storm itself, though with how sparse the information we've obtained thus far is, that may be a tall order.

[His experiences with the ghosts have been relatively minor, but of course, it would be easy to miss them when so much of his attention is occupied by ANGRY STORM ANGRY ANGRY.]

I've visited the level above, and it's largely the same save for being open to the air, and thus the storm. The trees are less tangled since they've the space required to grow upwards, but there are no obvious signs of recent non-plant life there either.