An old article described assorted tricks, stunts and gimmicks which were/are often presented as internal martial arts skills. Eg:

Bending a weapon held on the throat by walking into it
The unbendable arm
Bed of nails
Hot coal walking
Sledgehammer to the cement blocks held on chest

Now these are merely some of the more common stunts. Of the list above (or add your own) how do you EXPLAIN (debunk) the particular showmanship so it s not "magical". Nothing wrong with having a exciting demonstration, nothing wrong with a good show... but what do any of those (or similar demonstrations) have to do with genuine martial skill?

What would be a GOOD, clear demonstration of genuine martial skills? Help unravel the above demonstrations, or those others will hopefully suggest... Thoughts anybody...