I'm the kind of person who regularly gets confused about which is left, and right; so imagine this twit being confronted by what may be a ghost...
Anyway, a couple of decades ago I worked nightshifts in a plastics factory. If you own a toothbrush that went bald in a matter of seconds, blame me. One night, I was alone at the rear of the factory, and saw a vague 'boy' emerge from the concrete/breeze block wall. Before long, it became like points of light, and slowly vanished. A curious thing is that when I rushed to tell the few other workers, even the ones who'd normally laugh uproariously at my everyday bonkersness developed goose pimples(!) Anyway, apparently other people had witnessed similar. My friend Jane and I went to the library to investigate the area's history; being clueless, a kind librarian helped us, and it turned out that there was only one suggestive thing about the specific site - it used to be a kind of communal swimming pool and, apparently, a boy had drowned there before it inevitably closed.
I'm well-used to my reactionary idiocy by now (and was even then), and so over the years I've decided that I was merely tired and therefore hallucinated or whatever. However, some things give me pause nonetheless:
* Both Jane and I apparently saw exactly the same thing, even down to the colour of the clothing.
* This may well be peripheral, but a couple of local industrial estates are pretty infamous among workers for hauntings. A few anecdotes known to me follow:
* At a different factory, workmen have refused to work or stay overnight after reporting noises such as shouting and hammering, and seeing contemporaneous sparks in darkness; that area was once a quarry. In Winter, my dad and his boss arrived to open up the factory and found the workmen had gone to sleep in their vans because they would no longer in the unit at night, despite it being much more prepared, warmer, and comfortable indoors.
* One worker (same factory) saw a 'devil' waiting for him in the corridor between machines; another saw a sinister man in the same 'alleyway'; it might be notable that both men were known to be cheating on their wives (guilty conscience triggering hallucinations perhaps?).
* Employees did not like to walk the 'scenic route - long grass etc - to the factory because of the scary feeling of being watched. This path led directly to the remains of the old quarry, and was a path used in those times by quarry workers.
There's more, but mostly minor and uninteresting poltergeist-type stuff. Despite all this 'evidence', I still doubt myself...simply because I know how bad nightshifts can be - you can feel zombiefied night and day.