This is not the first time I've seen this happen, but it's the first time I've caught it even halfway through: something (I can only assume a goblin corpse as I've fairly confident there were no living goblins there, but really I don't know) created a rapidly expanding and dissipating wave of boiling goblin blood.
Mudposts
Submitted by: Darkflagrance - 2011-05-30
It does look like the ground is covered in goblin corpses...maybe the blood was a covering on a piece of clothing that burned up and thus vaporized the attached blood?