This is both amazing in it's technical achievement, and frightening in its potential for abuse and inappropriate use.
It's the new Taser XREP (Extended Range Electronic Projectile), and its coming to your local PDs 12 ga shotguns next year.
I had two flash vids embedded here but I couldn't stop the damn things from auto playing, so heres the links instead:
Video 1: Promo Video
Video 2: Informational Video
Warning, loud auto-play and a near critical case of mallninja marketing bullshit to follow.