Call of Duty has had quite a few easter eggs throughout its many releases. It's always fun to see people go around and figure them out just after release, and Black Ops 3 is no exception.
I will say though, this one found in Nuk3town is pretty special. If you go into the game and start shooting all of the arms off the mannequins on the map, you'll get a rather creepy surprise once you attend to all of them.
Just remember though: Don't turn your back. Don't look away. And don't blink
Thanks to TheHiddenBlade01 for the video!