The lesson to learn from John Wick is that no matter what you do to a man, do not mess with his dog. Russian gangsters brutally beat up John Wick, played by Keanu Reeves. They break into his house, club him to the ground and even steal his vintage Ford Mustang. But what really pisses him off is that they kill his dog Don’t get me wrong – I love dogs. I have three at home. And the one in this film is staggeringly cute. But dog death unleashes an hour and forty minutes of mayhem in New York.