For those of us that couldn't make the trip to Yankee Stadium to see The Big 4, Metallica has posted a 28-minute mini doc which features all involved bands jamming Motorhead's 'Overkill'.

Metallica, Megadeth, Slayer, and Anthrax have been collectively known as 'The Big 4' for many years, it wasn't until recently that the four bands agreed to perform shows together -- a trend that started at last summer's gig in Warsaw, Poland and resulted in one U.S. show in California.

After mended relationships and several overseas gigs together, the originators of thrash metal returned to the States to take on a gig at New York's Yankee Stadium. Metallica had the cameras rolling and posted a 28-minute mini documentary, which features mostly footage from the day of the show -- September 14th.

You get a rare look behind the curtain as Metallica does a meet and greet with super-fans, melts faces with a laser light enhanced performance of 'Blackened', and is joined by members of Slayer, Anthrax, and Megadeth for a super-jam of Motorhead's 'Overkill'.