Same thing happened to me (though not on FB).
Five years ago (in 2012), at a website board I visit, I put up a gif I found of Griffin and his 76 yard run against the Vikings. I entitled it in my post "A Little Slice of Awesome!".
Now here in 2017, someone bumped up that thread on that website, and I saw my post again.
All I could do is give a little sad sigh as to the belief I had then that the Redskins had found their franchise QB, and the team was set.
Five years later, Cousins is my guy, and Griffin is out of the league.
You just never know.