Social media users were delighted to see Facebook CEO Mark Zuckerberg getting into the Halloween spirit as he posted pictures of himself and his family dressed up in costumes. Among the photos was Zuckerberg dressed as the famous assassin from the John Wick movies, leading to a wave of memes and reactions from netizens. This comes as a break from the tech mogul's usual attire of a hoodie and jeans, making for a fun and unexpected surprise for his followers.