Groan at the mausaleum
I was at a graveyard when I was walking with a friend at nighttime. We heard an audible groan.
We got the H*** out of there but I was curious. Was it really a ghost? I returned to the same gravesite the next day.
The sound had come from a crypt and looking over the names and inscriptions I saw nothing out of the ordinary. Zero nada.
To this day I wonder what it was we really heard.