Not all "coincidences" are real coincidences.
Many years ago, I was doing much more computer support along our CAD/CAM software than I do now (Pentium 3 and Pentium 4 era).
We had this customer who called me one Monday, saying the computer would not boot and just display the error message "HARDDISK NOT FOUND". Of course this was mega urgent, he had to deliver a project, etc.
Well, I chatted a little with him, asking how his weekend went and so on and then I told him this: "Now turn off the computer, count to five and turn it on again - it will boot".
And so it did. The customer up to today has no clue how that "miracle" worked, how I knew it it would turn on and why he had to count to five. He often remembers this episode when talking to me.
So what really happend?
1) I knew that the company had no heating and it had been raining all weekend. The shop floor was really cold.
2) I knew that the harddisk was not starting because the motors were stuck due to them being too cold and eventually the BIOS would time out.
3) I chatted with him over 5 minutes, while the computer was turned on. That generated enough heat to release the stuck motor (grease).
4) I just told him to count to 5 for my own amusement.
5) I had about 50% chances that the computer would boot up on the next attempt - the same happend before at the same customer (but with other operators) and at other customers.
One of my friends had a funny (harmless) coincidences in his life:
Once he was dating this girl who lived in Madrid (600km from Porto). He was this crazy dude who thought it was cool to have a GF that far away. He would skip classes on middle of the week to just drive to Madrid for the day. In short terms, he was nuts (but a cool guy and great friend).
So one day we where at Uni and he told us that his GF was visiting him in Porto for the first time.
Later on, another colleague was filling up his car at a gas station downtown, when a car with spanish license plate stopped. Out came a girl who asked him where street so and so is (my friends address).
He just replied "oh, you want to go to Jose's place - just follow me!" (name changed)
She was really impressed on how popular her BF was - Porto is a city with a population of roughly 1.000.000 people - and the first guy she asked for the address, knew her boyfriend!
Cheers,
Vitor