Have You Seen the Dog Cheese Challenge?
The Internet's current fixation is the "Dog Cheese Challenge." You throw a slice of cheese onto your dog's back and then watch them try to eat it. Apparently, it started when a guy tossed a slice onto his dog's back just to see what would happen.
(Search Twitter for "Dog Cheese - A Game Of Skill And Snacks For Your Furry Friend." Here are more details.)