Duolingo wants to remind everyone to get back to their lessons. But where did everyone go? Subway Surfers: the mobile game with the most downloads of any mobile game ever (4 billion). In this game, you play as a spray paintin', hoverboardin', train track runnin' kid, trying your best to dodge trains and get away from the law. Duolingo will partner with Subway Surfers and deliver a new season of the game titled Duo Dash. Now, instead of a cop chasing you, Duo the owl is chasing you. If he catches you, he'll transport you to the Duolingo app to do your daily lesson (and then you can get back to running). This way, we can integrate Duolingo into what people are already doing in a seamless and fun way, reminding them to learn some Spanish.