Havent seen one but we have something that walks across the landing and 'switches' the bathroom light on....except it doesnt actually go on.
As I have kids the landing light is left on and our bedroom door is open, so anyone going to the loo in the night has to walk past the door....on more than one occasion, when Ive still been awake Ive heard movement, seen the shadow go past the door - hear the light click.....then waited for them to come out...nothing....go and check and there's no-one there.
In the 14 years weve been here it must have happened a dozen times but my husband had never been awake or about....until a couple of months ago...boy was he spooked! lol lol
Our house was 'born' in 1922 and lived in by just one family until we bought it...the dad died here...so I imagine its him....its the warmest house Ive ever lived in - we dont have central heating and dont need it, even in the coldest winter....so I guess he's keeping it warm for us.
BG