Sonic Tattoos

Ever see those 'blood pots' people get in their flesh after a mighty impact? Like a car wreck? Perhaps you call the little ones 'blood blisters'. Well, with these pen-sized sonic impact inducers, folks who love body abuse for greater beauty, boasting rights, and tribal right-of-passage can get great designs drawn in deep, deep blood blisters. Blood pots. A row of rivet-like black circles across one's back or shoulders. A row across one's nose and cheeks. When they are highly domed and red, then they turn low, hard and black. You can get the same results with a blackjack, but it's hard to control the aesthetics.

Later, as the technology improves, big fancy designs can be impacted into the flesh of the aficionadoes.

And for the inner circle, imagine having designs impacted where only x-rays can detect them ... like on yer liver or kidneys.