yeah, in my old house I walked out to the hall from the living room and at the top of the stairs was an old lady.
I jumped, then I said 'ooh, you made me jump' then I realised I didn't know who the f it was, so I shouted 'oi excuse me' and ran up the stairs - but she'd gone!
Now what I had there, was a 'ghost' encounter. Except ghosts don't exist, so clearly my brain threw a 5 second reboot or something. Fascinating, i'd love to know what it was about, but there are no ghosts.
thinking about it later it made me chuckle that I said 'excuse me' to a stranger upstairs in my house - now THAT is what make somebody British