my non-ghost story:
back in the day when the first nipper was a baby my missus was upstairs putting the little angel to bed
I was downstairs with the baby monitor on when quite clearly the message came across 'can you come upstairs and help please'
I jogged upstairs, asked what was up and my wife didn't have a clue what I was talking about. Long spooky conversation ensued about being beckoned upstairs, she pointing out the monitor was unplugged and in the other room. Woooooooooh spooky.
About a week later, both of us sat downstairs, nipper starts crying over the baby monitor but it just sounded different, 'off'. We jogged upstairs, nipper is fast asleep and peaceful.
Valuable lesson learned - if the people 3 houses down have the same monitor, you will also pick up their conversations and 'noises'. We always made sure the monitor was off and unplugged before trying for our second nipper after that.