Bioluminescence in my neighbours Oak tree...?

Hi Folks,

Someone might explain this to me , perhaps I'm just going nutty but this is the second time I've withnessed

a type of strange green glow. I saw this a few nights ago looking out my window as i woke up at about 2 or 3 in th emorning.

Now this tree is about 200 years old, its quite big.

The effect I saw was quite crazy and strange. At first I thought it was a type of light or lights that they had put on for effect but i ruled

that out after the way in which this effect was occuring on the tree. It was as if the leaves of the tree or maybe even the bark or branch was flouresing in a green type of random wave like pattern, random being the correct word...it was always slighty different each time.. very beautiful I have to say....

What is this does anyone know,

R