It were a couple of inmates; Toto were some kind of mad scientist and 'im and 'is warden 'ad some weird power related to blood - well, that don't matter. The point is 'e used it to create a nanovirus that sent anyone it infected stark raving bonkers - aggressive, paranoid, the works.

Any road, it 'ad some unusual effects on us. My people. There were three of us 'ere then: Narvin, Rassilon and me. The rabies got us square in the psychic centres; turned 'em up to eleven with the paranoia and aggression at full throttle. It were strong enough that the three of us manifested a physical embodiment of our dark sides. An actual monster, rampaging the 'allways full of all the unpleasantness we normally keep on a leash in our 'eads.