Coincidence or Like minds think alike?

Last Tues. night my hub wrote on my blog "Half a century...Entire civilizations have come and gone in a shorter time frame..."
The next day, my birthday I received a package from K&J who live 1500 miles away or something like that. I just know it's far.
Kate wrote sweet and lovely words then Jonathan wrote his observation.

"Mom, Wow, 50. Half a century. Whole civilizations have come and gone in that time period."

I immediately called David to see if they discussed this phrase about civilizations and my age together. He promptly said, "NO" but then said, "oh that's why J wanted to know that night if I had recieved the package." They never discussed it and both claim they came up with it on their own. eeeeerie
So has this ever happened to you? I just thought it was one of those "twilight" moments.