Before I share this story, I would just like to say that this was an experience my parents shared, so I am writing this on behalf of them.
Years ago, when my parents first got married, they were lying asleep in bed one night when all of a sudden were woken up, startled, by the sound of the doorbell at 3am. Dad jumped up out of bed and raced to the front door, thinking it was an emergency of some sort - I mean who would be visiting at that time of the night? When Dad opened the front door, there was nobody or nothing there.
When Dad crawled back into bed, Mum was still startled and Dad reassured her not to worry, there was probably something wrong with the wiring of the doorbell and to just go back to sleep.
Within seconds, the doorbell rang again. Dad got frustrated and up out of bed and instead of opening the door, he peered out the window, hoping to catch whoever or whatever was ringing the doorbell. Once again, nothing. He stood there for a while, finally hearing the doorbell ring again and this time he opened the front door. At that moment, a cool wind brushed right through him. Mind you, this was a completely still evening... Not even a breeze.
Dad closed the door and jumped back into bed. At this point, Mum was still freaking out and he just continued to reassure her that it was nothing but bad wiring and to go to sleep. But Dad knew this was a message of some sort...
A few minutes later the doorbell ONCE AGAIN rang but this time for a couple of minutes, it was as if somebody was pressing on the button non-stop making a long "BEEEEEEEEEEEEEEEEEEP" sound. Mum and Dad just chose to ignore it and go to sleep.
The next morning, Dad received a telephone call from his family in Europe, informing him that his cousin had passed away at 3am (our time) that previous evening.
Dad also informed me that this particular cousin really enjoyed playing with things that made a lot of noise, such as doorbells.
I guess the cool breeze that brushed past my Dad and the doorbell ringing that previous evening, was my Dad's cousin's way of saying a final goodbye.