Professor plays prank on class; video goes viral

A U.S. maths professor has become an online star after he played a joke with his students on April Fools' Day. Matthew Weathers, a professor at Biola University, interacted with another version of himself from a YouTube video to fix a whiteboard mark that he “accidentally” drew on a projector screen.The video of the prank, which was planned, filmed, edited, and rehearsed by Weathers, has been received more than 2.1 million views. Weathers said that he has been making prank videos since 2009 and seizes opportunities such as Halloween, April Fools' Day and Thanksgiving to entertain and interest his large class.