Pushincidence 

When one pushes a button and a unrelated sound or event happens at that exact moment.

I love a good pushincidence. Just now, I happened to push the enter button on my keyboard and the phone rang at that exact same moment.

Pushincidence by Hermes The Geek October 18, 2013

postincidence 

An otherwise unrelated post that addresses the post appearing directly above it in a social media feed.

Sally: "I posted on Facebook that I need a new computer."

Harry: "Yeah, in a bizarre postincidence there was something about an Apple giveaway right under your post. I sent you the link."

postincidence by zerz July 16, 2013