Bungee cord leashes

I remember the bungee cord leashes with the leather ankle straps. Man, that was something. Not only did the board fly back at you at a high rate of speed but watch out if the cord wraps around your arm , leg or finger. I haven't heard of any serious injuries from them but when I used those leashes I was surfing Rockaway Beach NY and , in the early 70's, I would say the number of surfers in that area were fractions compared to the number of surfers today. When we would get a few weeks of sizable surf, the bungee leash would stretch out. According to your surfing ability, the times varied between when and how long your leash would stretch before breaking.