Defending punches with shockwaves part 2

Here's a look at a few clips of Glen  Levy here hes delivering a deep shockwave with a hammer fist,the people holding the phone books do not know how to breath properly to absorb the strike and you can see the effects on  the body even when they know the strike is coming

I heard people say this is exaggerated but I've seen and filmed similar reactions myself Ill be having a closer look at a few of them in my next clip.