I dug my first grave

We had a grave to dig, and I was the guy who got to jump into the hole, when the excavator was finished scooping it out, in order to smooth down the sides/bottom with a shovel and get at the stuff the excavator can’t reach.
While moving the dirt around (a heavy damp sand for the most part) I uncovered a good sized piece of wet rotted wood. The guy up top suggested that it looked like an old survey marker. Me, I suggested, jokingly, that it might have been used to stake a vampire.
A few minutes later things turned somber… I uncovered what may or may not have been pieces of human skull… specifically the upper part around one of the eye sockets.
It was then that we’d agreed that we’d dug deep enough and just levelled everything as best we could, as gingerly as possible.
I really hope there aren’t going to be any repercussions from disturbing that stake. Last thing I need is a vampire problem complicating my life.