you get a notification from the Duolingo app on your phone, the notification says "Hello this is a message is from Duo himself "It seems you haven't done your Spanish lesson today. You're aware of our agreement, right? It was in the terms of service, and it stated that if you missed your lesson, there would be consequences. I'm currently 500m from your location and approaching rapidly. If you don't want to get hurt or worse, I suggest you take your Spanish lesson today. Capiche?"