I used to have Bruce Tegners and Joe Lewis` paperback instruction books when I was a kid,along with copies of Black Belt magazine of course.
A neighbor who was a Black Belt was teaching me and a few of the other kids karate at the time..........until he dropped some acid and broke his hand punching a brick garage wall. 
I always pictured myself going into a fight and telling my opponent "Hey wait just a minute or two until I turn to page 101-105 so I`ll know how to defend myself against your attack.
LOL 
Reminds me of a funny story when I was a kid.
An older guy I knew who was ex Scottish Infantry ( the Argylls)had an argument in the street with some guy.
The other guy went into a karate stance & the guy I knew said laughing, " I'll show you karate army style "
He kicked him in the balls...🤣
I still remember it clearly