This is a very old gimmick, as old as the first light weight fiber based bodyvest invented in the 60s.

Richard Davis in 1975 was one of the first ones to do this stunt on a body vest. Check out the video here => https://youtu.be/IwBLL7Z3OvU?t=91

I do vaguely remember seeing someone put the Kevlar vest (invented in the 1960s) also to test in a similar manner i.e. by wearing it and getting shot, but I can't seem to find that video (maybe I had it wrong).

> Stephanie Kwolek, who died Wednesday at 90, was a DuPont Co. chemist who in 1965 invented Kevlar, the lightweight, stronger-than-steel fiber used in bulletproof vests and other body armor around the world.

> A pioneer as a woman in heavily male field, Kwolek made the breakthrough while working on specialty fibers at a DuPont laboratory in Wilmington. She developed a liquid crystalline solution that could be spun into exceptionally tough fibers, several times stronger by weight than steel.

Source: https://www.masslive.com/news/index.ssf/2014/06/stephanie_kw...