In today's ONE Championship event in Thailand, Russia's Timofey Nastyukhin (10-2) produced a nasty KO victory against Australia's Rob Lisita (14-8) in a featherweight bout. It took all of 6 seconds for Nastyukhin to fell his opponent with a left hook, then follow it up with a brutal soccer kick to the head to end the fight. KOs in MMA seldom happen more quickly than that, and it was pure violence.
You can watch the multi-angle replays at the top of the page, courtesy of Zombie Prophet. Here is the live footage of the entire fight in the video below, via Jolassanda.