I'm sure that Level 10 pain is the worst pain anyone can ever imagine.
The fact that people only really experience it moments before they become one with death really explains how painful it is. Yet, it can be experienced in people who are alive. They experience pain such as connective tissue disorder.
The bodies white blood cells attack the tissue in the body and the organs too. Therefore almost, in a sense, ripping itself....From itself. If I'm not mistaken that is.
Level 10 pain is THE WORST pain describable. If fact....I actually don't think it can be described. :\