The Spirit In The Weeping Willow Tree

This story of mine takes place at my grandparents four years ago. I will give you a little bit of background information. My family is very spiritual and many of us have encountered spirits or some sort of entity. They believe that "weeping" willow trees are weeping due to spirits trapped inside (there is a story behind it but to long).

I was staying at my grandparents for the weekend when all of this happened. Like any other normal day my grandparents were working outside on their flower beds, the garden, etc.). My grandfather was trying to trim the leaves of the willow tree because they had grown so long it was starting to look funny. He got frustrated doing it and started cursing in French and calling the tree names. My grandmother was nearby and told him to stop trimming the leaves in such a way and to apologize because he was going to upset the spirits trapped in the tree. Of course he told her she was crazy and continued on the way he was. I know this all sounds crazy.

That night it was a full moon (strange coincidence?), everyone was up chatting since my mother and sister were also over. All of a sudden we heard this wailing it was so loud and high pitched. It almost sounded like a girl but at the same time an animal. The guard dog immediately started to cry and hid under the table (something he has never done). Things started to get scary. Since it didn't stop for about 3minutes my grandfather picked up his gun and went out on the balcony to see what it was, nothing was there. Then we all came out and nobody could see anything. We could just hear the wailing circling the house as if the spirit was running around it crying and even with the big flashlight, nothing. What really frightened us was that my grandfather was always in the woods behind his property and where he lived, he also was a hunter and man of the woods he knew animals and their specific sounds. The two neighbours they had even went outside in shock and couldn\'t see anything. We went inside terrified; we all knew my grandfather had upset the spirits in the tree. The crying didn't stop for two hours. After it stopped we all went to bed but me and my sister couldn't sleep.

We went home on Sunday and nothing happened again until a month later on another full moon. My grandparents phoned us the morning and told us the spirit came back around the same time for a few hours again. My grandmother told us that she was going to tell my grandfather to apologize to the tree or else it would happen again. He apologized and nobody has ever experienced anything like this since.

Has anyone heard of anything like this happening? Or experienced anything close to this?