Is 'go ballistic' related to ballistic missiles?
Yes, it is related to the origin of the idiom. To 'go ballistic' means to become very angry. Its origin comes from 'losing control and assuming a free-fall trajectory like a ballistic missile fired from a fighter jet' during the Vietnam War, but now the term is often associated with the long-range, typically nuclear-armed missiles. So if someone is 'going ballistic', it means that they might be angry enough to fire a ballistic missile.