April Fools’ is a day of jokes. Razer's Project McFly — a hovering mouse — caught a number of people by surprise, including the Wall Street Journal: http://blogs.wsj.com/personal-technology/2015/04/01/the-6-best-april-fools-tech-videos/.
Razer’s Project McFly Cracks Wall Street Journal’s Top April Fools’ Day List
