You go for a walk in the night. And hear some noice. You go to it's source and look up. You see how The Riddler fights on the roof with Batman. The Riddler makes a a deft stroke with a question mark cane and The Caped Crusader falls on the ground. After that, the Riddler suddenly jumps from the roof, grabs you by the arm and you two run through Gotham until he turns into one of the dark alleys. He turns to you with a trademark Nygma smile. — Wanna hear a riddle?