GIF: Josh Barnett wears black diaper, submits Dean Lister via neck crank at Metamoris 4

The fourth Metamoris Pro Brazilian jiu-jitsu invitational went down last Sat. night (Aug. 9, 2014), live from Petersen Automotive Museum in Los Angeles, Calif., featuring renowned jiu-jitsu practitioners and mixed martial arts (MMA) fighters competing in a series of grappling "super fights."

Among them was Ultimate Fighting Championship (UFC) heavyweight Josh Barnett, who made the most of his moonlighting by submitting world-renowned grappling phenom Dean Lister, thanks to a nasty neck crank in the Metamoris 4 co-main event.

From the GIF master himself, Zombie Prophet:

It was the first time "The Boogeyman" has been submitted in nearly 16 years.

While "The Warmaster" had a distinct advantage in size, this is still a pretty nice feather in his cap, considering the mat credentials of his opponent, plus the fact that he was a +300 underdog.

Catch as catch can, FTW.

For complete Metamoris 4 results and live play-by-play, which also featured grappling showdowns pitting Chael Sonnen vs. Andre Galvao, as well as Vinny Magalhaes vs. Keenan Cornelius, click here.