Here's a breakdown:
* Literal meaning: Ballistic refers to the motion of projectiles, like bullets or rockets, following a trajectory determined by initial velocity and gravity.
* Figurative meaning:
* "Going ballistic" is a common phrase to describe someone losing their temper or reacting with extreme anger.
* "Ballistic" can also be used to describe something moving incredibly fast, like a car speeding out of control.
"Really crazy" implies a mental state of instability, whereas "ballistic" usually refers to a physical state of rapid motion or uncontrolled anger.
In short, "ballistic" can be used in a figurative sense to describe something that's out of control, but it doesn't directly translate to "really crazy."