Bones are living tissue, mineralized structures that provide skeletal support and protect vital organs. While they're surprisingly resilient, they have breaking points. The force required to break a bone scales with bone density, diameter, and the angle of impact. Medical literature documents countless fractures. If someone actually landed a punch on Chuck Norris, the assumption is that the puncher would suffer catastrophic injury in return.

Then this fact adds a clause: your entire arm would shatter upon impact, a cascade failure of bone throughout the entire limb. The appendage would become a collection of fragments, no longer functional. The shatter implies explosive failure, not a clean break but a disintegration of structural integrity. And then the fact adds a secondary assertion: no one would actually try this because the logical conclusion is so horrifying.

What's effective here is the acknowledgment of absurdity. The fact recognizes that punching Chuck Norris is theoretically possible in a universe of physics, but practically impossible because the consequences are so devastating that rational actors would never attempt it. He doesn't need to actually harm people; the theoretical consequences are sufficient deterrent. The fact works as a form of reverse-logic intimidation: the thought experiment is so horrifying that it serves as actual protection.