To the collar? No one has gotten the things off. Ever. They take people for check ups too. You'll know when the drones come for you. [He points to one idly cleaning up in the hall and doesn't talk further until they're out of its ear shot.]

They're the eyes and ears of the tower. So watch what you say around them.

Collars don't explode. But I heard if they put the wrong fluid in it, shit goes bad for the sucker in that situation.