The Muggle street was in ruins about him.
His life was in ruins. More awful than that, he still had his life to live.
Peter had fled, and he had failed to kill him. (Though he deserved a worse fate than mere death for the depth of his betrayal.)
James and Lily were gone. Their son – his own godson – faced a bleak future.
Remus would think him a traitor like everyone else.
It was all his fault.
He had failed himself, his friends, his godson.
Sirius laughed among the devastation, as he waited for them to come and get him.