Patient admitted for something unrelated starts deteriorating for no discernible reason. Has some mild generalized abdominal pain, but other than that no specific symptoms. However, he keeps worsening to the point where he's barely hemodinamically stable.
On the abdominal contrast CT, there's fluid everywhere. Organs pushed against the abdominal wall. Just one enormous grey puddle from the top of his pelvis to his diaphragm.
And then, at some point, there's a scribble of white pretty much smack dab in the middle of it all (in this context, signifying active bleeding) It was shaped like the world's smallest firework pop, and it was nowhere close any major vessel. Everyone was dumbfounded for a hot minute.
It turned out to be a spontaneous, atraumatic rupture of the cystic artery. No surgeon in the building had ever seen one.
Dude underwent embolization and made it out completely unscathed