There's a social media challenge called the "What The Fluff Challenge" and it's actually pretty fun to watch, compared to some of those other challenges.

It's basically a peek-a-boo game with your dog. You hold a sheet or blanket in front of your body, and then let it go as you duck away and hide. The dog sees the sheet fall, but you're not there. It works best if you're near a doorway.

Here's the post that started it all:

Cats are getting in on the fun too, try it out with your pets: