There may also be a question of style (formal/conversational). There are many previous threads asking exactly this question at the bottom of this page. I think it has to be "diggin" the colloquially shortened form for "You are digging," or at least I assume the subject would be "you" https://sextreffen43017.blogginaway.com/34393100/indikatoren-für-flight-sie-wissen-sollten