I never did that. We would go round and round like Olive Oil punching at Popeye. Then someone would land one and draw blood. So, like sword play we would fight to first blood, and that was, you know, lip, nose, eyebrow, in that order of lucky. We never even considered body blows. Try not to run, try not to just windmill the fists. By the time I was 15 I could aim and so could George Bolton, my long time neighbor, nemesis.
We simultaneous popped each others left eyebrow open and blood went everywhere! We so shocked, and horrified at the sight and the PAIN, we both burst out crying and fell into each others arms promising to never fight again. And we didn't.
By the time I was 17 I was just about to climb the stairs to an un-lighted squatters', Head Shop, and my new destiny. But, I was going to a very rough high school and fighting was required. By then, I realized we could both be severely injury. So, I developed a sort of front kick defense, and did not care about, the "hey, no fair!"
I don't like to injury people, I didn't want my Dad to find out.
So I naturally began developing ideas around, non-invasive pain application, which I study to this day.
It sprang into my mind at the proper moment of focus.
Got called out for a fight, in the gym. Coaches gone, doors lookouts set, girls in the stands, abandoning basketball self drills. WTFF!!!?? So, the guy would have been an OK match for me...behind the gym with a scratch line. But, this just seemed like spectacle to this young boy from Texas.
So I walk up, he began his guard, (it OCCURRED to me) So, I slapped him with my strong left, wide ham palm, swinging from behind my hip with everything I had. He went down. And then though there was no line, he was unwilling to come to scratch. He actually kept repeating, "no fair!!"
Today of course, it much more vicious and easier to be injured. And therefore my, go to, is not necessarily a slap. But, the concept was born. And a giant slap takes the fight right out of almost anyone.
Where were you that your thugergy used an actual line? Sound commonweath, not hillbilly.