Wandering the world as a ghost means passing through doors in a special manner.
It works pretty well but in the sewers its very hard to pass through the closed thick doors. The ghost keeps getting stuck in the middle of the door making it very hard to explore that area as a ghost. Gets kimd of frustrating after having to @ return too many times only to return and get stuck again.
This means that hiding a corpse from a player in the sewer is pretty unjust as well.
(looking for my corpse that got hidden away by other PCs if anyone is wondering why I am exploring as ghost).