[He hears the pause and is briefly tempted to mention he taught young adults and heard a great deal of profanity, but decides it's a bit of harmless fun to let it go on.]

A possessed doll.

[Less fun. Much less.]

I'm on my way.

[Sure enough, several minutes later Emmrich is there, glove on, staff in hand. He'd ask 'where' in the basement but the thumping is easy to locate.]

Do you know any of the specifics? The method by which it was possessed, or the nature of what possesses it?