Juany118
Senior Master
Oh yeah. If you cover by grabbing the back of your head and the incoming fist meets the protruding elbow it, ouch. Likewise when blocking a body shot with the forearm but strike the fist with the elbow instead. When the elbow meets the forearm of an incoming haymaker, that's pretty awesome.
It's fighting after all, and nothing is at all "safe" from the perspective of a non-fighter. But neither is skiing or rugby, so there you go.
What you describe above is actually one of the reasons for one type of "cover" in the Kali I study. It's one of many methods of gunting. The only difference is we don't grab the back of the head, we sometimes describe it as a "salute". It can be anywhere from the hand being around the temple, going as far back as covering the ear, but we never grab the back of the head for whatever reason. I am guessing it's because it slows down using that limbs for a counter strike.