Unique enemy shenanigans: Act 1

Ok, so kind of new player experience that I found amusing so I figured I would share.

I was running through the ramparts in act 1. I found a nice unique mob in stone. Neat! Time for a fight and some drops. I kill what I thought were all the mobs around it, get myself nice and set up (I was playing a sorceress at the time) and break the emergency stones to get started. Hasted and temp invulnerability. Not the worst thing I've seen so far but not the best. I get started and things are going ok...

Then I see some funny blood strings come in from offscreen. I know what this is: a Courtesan is using her exploding magic. On the unique I'm fighting. A few seconds later, and it goes pop and the fun immediately stops. Not because the enemy is dead, but because he's dead with no drops. This makes me very sad at first but then I can't help but laugh at my misfortune.

Lesson learned. Double check for Courtesan enemies before opening up unique monster fights.

TLDR: Courtesans can blow up certain kinds of special monsters with their weird blood magic. Beware.