Green Ghosts

In a corridor with son C. Wood lined and pretty scary. Almost dark.
A slightly luminous and ghostly figure appeared in front of us and asked if we wanted some target practice.
I was too shocked to say anything but C replied that we would give it a go.
The figure led us downhill, still in the wood lined corridor into a huge hall.
We walked along an earthy ridge into the middle of the hall.
The hall was lit with an eerie green light and the massive unsupported ceiling sagged downwards in a threatening manner.
It felt that we were far below ground in a place unvisited by humans.
All round the hall, walking and floating were numerous green ghosts.
We were given a gun each and told to shoot at the ghostly figures.
We did this but to no effect. The ghosts only give a grim laugh and went about their business.
Ghosts cannot be simply shot down, they obviously require a different approach.
Therapy beckons.