It's Wednesday afternoon and you've just requested an Uber. As you finish clipping in the seatbelt your driver slowly turns his head to gaze at you with a prolonged creepy smile. In a deep voice he asks "What's your favourite color?". For a moment your heart stops beating. Images race through your mind. Is he that serial killer they've been looking for? You immediately reach for the door handle. But just before you get the chance commando role out the door and submit a report to Uber for 'inappropriate driver behaviour' you notice something unusual -colorful writing on the windows. You driver isn't a psychopath after all. He is Eric DiStefano, a successful Uber driver from Nashville, Tennessee who has come up with a novel way to entertain his passengers. When you step into Mr DiStefano's car you'll discover an assorted range of liquid chalk markers in the cup holders. Riders are encouraged to draw pictures and write messages on the glass. According to Mr DiStefano the adult passengers enjoy defacing his car and it hardly obstructs visibility. His ratings have already gone from 4.80 up to 4.82 since introducing the liquid chalk earlier this week. When asked about plans for the future Mr DiStefano remarked "I've been overwhelmed by the media response so I haven't had time to consider where this might take me. For now I'm just chalking it up" If you have any updates on this story please post below.