Because now descending into the chaos is James Potter, Regulus Black, Barty Crouch Jr., and Evan Rosier. They’re grinning--or as close to grinning as some of them can get--and Regulus is holding a sword in his hand, Barty is holding a fang, and Evan is holding a journal. However, their clothes are torn and they’re got scratches and bruises and they’re a bit bloody and covered in dirt but overall they seem quite happy.