Wow, where'd you get that graphic of MR. Bean Else? I have to admit that was unexpected and it made me laugh.
As for the rock. When I was a kid and not a JW, I had a slumber party and we had a seance and conjured up an invisable being of somekind. There were five kids that witnessed the things the being did. We are all still alive and we all are in our forties. One of us, my brother is still a JW. This being was intelligent because it did just what we asked it to. There definitely are beings that we cannot see that dwell amongst us. Are they dead people? Are they demons? I don't know. All I know is that the "spirit" understood English and did what we asked and it stayed in my bedroom for two or three months. I moved out until it gave up and left. It never did anything mean spirited to us. We were scared of it because we didn't understand who or what it was.
Once someone told me that "demons/spirits" have different personalities and do different things with their time. Some possess people, some mess with the government, some haunt houses and some play pranks like hiding Bibles while your head is down for the prayer at a Bible study. That also happened to me at my study. We couldn't find that Bible anywhere. Then after the closing prayer, there it was, right where the sister had left it.
I don't know if this sheds any light on your question. Hope you figure it all out.
Heather S.