During the Negan phase, if Negan is in an unsecured room or adjacent to a walker, he follows the instructions for Negan's Rage as he kicks off at the survivors for failing in their simple task of clearing the way for him. If his path is clear, a card is drawn from the Negan Action Deck and the instructions followed on that. Sometimes, even if the survivors have done well, his card will put him into a rage, but that's life under Negan.