I do nights in a very old Nursing Home which was converted about 25-30 years ago from an old mill, and when your in a building with only 2 other staff, in complete silence and pretty much darkness while everyone else is asleep its pretty eerie to start with, however it must have been about 4 weeks ago now, to start off with myself and a colleague saw the nurse outside staring through the window when she was actually in the office at the other end of the building, and then later on the same night we was all downstairs in the dining room and could hear something above us (a locked store room is above the dining room) so we started walking towards the stairs to see what was up and we heard whoever it was upstairs following us down the corridor, so we ran down the corridor to get to the other end and go up the back stairs and the person (or whatever) upstairs ran along the top landing! We were terrified, luckily there is a couple of police who sometimes pop past and make sure were alright (were all women on nights you see), and they turned up so we got them to search the building top to bottom but nothing was found, however on the next round that we did we found 3 residents (who were incapable of weight bearing across the other side of the room in their bathrooms and they all said the nurse had helped them onto the toilet, etc. ...about 7 months ago a nurse died in the home!
But we hear all sorts around at nights, thats just the most recent, and i have to say the scariest thing thats happened since iv been there!