Sometime in the past year or so back when I was still friends with one of my old friends.
---PAUSE FOR BACKGROUND INFO ON FRIEND---
This old friend of mine has been hearing voices for like three years now. He's a god believing person and believes that they are demons whispering to him and he sometimes wakes up with claw marks across various parts of his body(Arms, face, chest, back, legs, just everyone).
These 'demons' also play pranks on him he says. From tripping him to saying things in weird languages that make him do stuff that he can't control.
He told me that their voices sounded like whispered yells really far away but right in his ear at the same time. He also told me that some of the other languages he felt like he could understand them but he could never remember what any of the words were or anything.
---BACK TO THE STORY---
So anyways, there was this one week and I had decided half mockingly and have seriously to quote some bible scriptures at these 'demons'. Upon my doing so he said they were not very happy.
He said that they didn't like to hear the bible scripture but I tend to think that they simply weren't happy I was mocking them.
So the next week or so I would be in class and I would hear my name being called to me in the same voices that he described. I mainly just ignored them. I went on a band trip that weekend and for some reason I got hit with a grape(not sure if it's related or not but it just seemed awfully random) and then when in perfect alignment with a pole that was sticking up out of the ground I mysteriously tripped and had I not caught myself I would've impaled myself through the chest on it. After that week I resumed my usual not-having-problems-with balance self.
I really wasn't friends with him after that, though the cease in our friendship was for unrelated reasons that had nothing to do with this. (So we won't talk about those reasons

) We still talk from time to time in passing though and I think those 'demons' have lessened now but haven't left him alone completely.
Sorry for the longish story but I figured I might include all relevant facts and see if you can't glean something helpful from the situation. It had similar voices involved and Zygo mentioned that he thought they might be trying to break his concentration. So since my story had malicious intent in it I figure I would see if it might help.
I hope I have helped in some way and if not it's still an interesting enough story I suppose.
~Farshief