The sound has the gun swinging around in the direction of the bonfire square and the Invincible, and they squint against the light of the fire-- their own lantern is shuttered tight, on their back still but held there mostly by the wire that had been threaded through the original braided twine, as said twine is long gone-- until they pick out the form near the building itself. That's a shape and size and kind of twitchy motion they know well. The gun moves aside, pointed at the unknown dark, and Crowley can probably make out the smile in the light of both bonfire and church candles.

They start the trek across the open space towards him, not willing to try shouting that far and bringing every spirit in the area down on them.

It's also pretty clear that they died in an explosion. Their clothes are in burned tatters, the only whole thing being the boots.