when that happens , bodies are not just incinerated , they are eviscerated , and though they are weaker than nuclear bombs in some respects , like that they do not spread toxic radiation nor do they cause destruction as widespread , they will blind anyone within a ten mile radius if one looks directly at them as they detonate , and the outward spread of heat is formed like a thin cord , so that if one is standing , the cord of heat will sever a person in half .