A Punch Censor?

I remember Batman from the 1970's. To hide the fights or make them less serious looking, graphics were used to illustrate punches, hits and smashes. While camouflaging the fights the punch censors also made them funny, so I'd guess they worked. Too bad that plan changed. I'd still rather see the censors, they had character. 

How would you use a punch censor? Assuming you would, of course.