I kept seeing a man pass from my hall to lounge
... as did my lodgers when I mentioned it one day to them.

Eventually I realised that when certain lorries went past, the multiple reflection made it look like a man-sized object was walking through. Of course, this happened so quickly that by the time you'd noticed it, it had gone.

Sheer luck that I happened to be staring at the right wall wondering whether I should redecorate when a large enough lorry went past to reproduce it.
(JohabMorelli is spenging merrily away, Thu 3 Jul 2008, 13:13, Reply)