Only a couple years after my mom's Ouija experience, at 8 years old is when I started noticing odd things going on around me. My mom and first stepdad had divorced and now at that the time of this occurrence we lived with my grandfather in Moore, Oklahoma.
Now in the room we shared, my mom and I, sat a desk with mirror and two drawers on either side. My grandfather bought it at an antique store. The drawers had keyholes in the bottom ones, and no keys came with. My grandfather paid a nice price for it so, therefore, made it off limits.
One afternoon, my cousin and I were sitting in the my room talking about all the weird things that had happened to her, my mom, and myself. I was sitting on a couple of boxes, and she was sitting on the bed across the room. My grandpa, mom, and grandma were outside taking care of outside yard work at the time.
While in mid conversation, we heard three soft knocks coming from the direction of the desk. We looked at each other, laughed and then started our conversation up again when we heard three more knocks and what sounded like a drawer slide open. So this time, I stand up and she jumps off the bed towards me.
We were standing next to each other and are looking at the desk. We both see the drawer had been opened so we screamed as loud as we could and our grandpa ran in and asked us why we're screaming. We told him what happened, and he got mad because he thought we opened it and were messing with his precious antique.
We left the room, scared out of our minds, and told my mom. She said that she had heard knocking come from the desk before, but always left the room when she did.
To this day my grandpa doesn't believe the drawer opened itself and he told us he never had keys to the desk. It was always locked and had decided against possibly ruining the value if he had accidentally broke the locks.
By the way the drawer had a brick in it, and a small piece of paper that my grandpa had grabbed and disposed of before we could read it.
I feel kind of weird for suggesting this and quite possibly that's all just bonkers, but if you're in your grandfather's area, perhaps you wouldn't mind checking just to see if there's anything to it?