[Glowing Bits!]

Thanks for the info.
By the sound of it, it was his way of saying goodbye, albeit through an organ.
Please do not be alarmed by this, it is rare anyone will ever encounter things like this happening, only the chosen will ever witness anything, it could be seen as a sign that he's made it to the astral world, a place our spiritual beings go after departing our physical bodies.
Personally, I have come across (even seen) things that would scare the hell out of most people, it is seen as someones message to the living, albeit good or bad.