You all just finished a hunt, and Cas is about to leave, seeing the work was done. He’s walking away, but Dean stops him for a second. “Hey, be safe.” “I will.” You and Sam stare at each other while Cas leaves, trying to repress snickers. “Be safe.” Sam says in a exaggerated tone to you. “I’ll be soo safe.” “Guys—guys stop. I’m gonna kill you.” You and Sam glance at each other while you added, “But how will that keep us safe?”