He stood in the graveyard of Godric's Hollow, where Lily and James Potter's bodies lay peacefully in the Earth. Dumbledore's yearly visit to pay his respects was nearly over, and he regretted that he could not spend an eternity with them. Unfortunately, as these things were, he had duties to attend to and a school to run. And of course, Harry Potter to care for. The toll of Sirius's death took heavily on the boy, and he needed to be prepared for the events to come. Dumbledore knew Harry would make his sacrifice to stop Voldemort in the end, when all the Horcruxes were destroyed. He regretted that the boy had to die, but he had no choice. Gaunt's ring would be one more step towards that.
He had only turned an inch when the Angel moved. It was inconspicuous as any other statue, but it's razor-sharp teeth were showing, in a shape that looked an imitation of laughter. It's wings spread gracefully, the opposite of the creature's true nature. The chiselled stone that created the Angel shifted in a nanosecond as Dumbledore looked away, to form an organic creature that nothing could ever see.
Dumbledore looked back, sure that something was following him. All he could see was an Angel. An Angel with it's hands over it's face, as if it were weeping. He cursed himself for thinking that Voldemort's Death Eaters could follow him here. As Dumbledore turned, a claw reached viciously onto his shoulder and he never saw the Angel, or anyone, again.