The original guy who wanted to start making kevlar vests did about the same thing to prove to police - who did not believe a fabric could stop a bullet - that his vests and the space age fabric of kevlar did work.
The guy took a gun, turned it on his chest, shot himself pointblank, took the hit and within a split second continued to shoot at targets setup 7 yards away, proving that the vest could take a bullet and the wearer could continue to fight.
Were these guys stupid? Yah probally.
Was it the worst thing you could do? Nah