I've never been catatonic before, but I've almost become catatonic before. I don't know if anyone would believe me if I told them, though. I don't know if any of you will believe me. But I did read about an autistic boy who felt the catatonia coming back, and told his mother, and started to deteriorate again and by the time his mother went to pick him upo at work he was just standing there catatonic with tears running down his face because he was becoming catatonic but didn't want it to happen.
I could feel it coming on too. There were black objects (containers) in my head waiting to trap me inside them. And since I would no longer have access to my eyes or my hands or legs or anything, I would have become catatonic. The black objects were the substance that is sadness/anger/boredom/fear all in one. I could feel it happening, and I didn't like it at all. I felt bored, depressed, outraged, and terrified that this was happening. And I tried to stimulate myself as much as I could outside of my head going on shopping sprees and starting 100 threads on WrongPlanet at a time, to make up for the damage already dne and to prevent further damage, but parts of me still got trapped in the containers never to be seen again. So part of me is catatonic.
However, since I think catatonia is only behaviorally defined, I think I know that there are happy catatonics and sad catatnics and so on.