It wouldn't be April Fools' Day without a nod to the Clown Prince of Crime, which is why we compiled eight of The Joker's most hilarious and utterly terrifying jokes. Though he would argue - "I'm not mad at all. I'm just differently sane." <a href="https://bit.ly/1dOpOJj" target="_blank"> <span> http://bit.ly/</span><wbr /><span ></span>1dOpOJj</a>