there's been loads, honestly dozen's.
Saw a victorian bloke stood through a chest freezer, it was in the corner of the room couldnt see below the top's of his leg's but saw the rest of him.
Me and the missus moved into a flat and the first night it sounded like someone was smashing the front room up with a sledgehammer i went storming in and nothing there, happened about 5 time's that night, i could stand at the door with it closed and the door would rattle/move like something was hitting it and the pics on the wall would do the same but as soon as i put my hand on the door handle it would stop. Every door in the kitchen would be open as you went in even though they would be closed when you left, so it was close all doors, cupboard's washer dryer microwave the lot leave the room and close door behind you give it 30 second's and go back in and all of them would be open again lol
Really fucked up stuff in there.

I used to have a video of a cctv camera from one of our unit's that would see a figure pass at 6 o'clock every morning and fill the screen but the place wouldnt open till 8 and the camera was 20ft in the air.