In karate class, they teach you to block kicks and punches with hard linear movements that force a clash between your forearm and the oncoming attack.

Bro, that’s whack stuff right there. Don’t believe me? Then just ask Roger Narvaez, who clashed with Elias Theodorou on the UFC 185 prelims and intercepted an approaching kick with some bones that weren’t up to the job. Narvaez crumbled not long after, and was beaten savagely until the ref stepped in. And behold, the postfight x-ray below!