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Hear a New Eminem Snippet in the Trailer for Boxing Film ‘Southpaw’

It'll knock you out

If you’ll recall, Eminem was orignally supposed to play the lead in Training Day director Antoine Fuqua’s forthcoming boxing drama, Southpaw. Jake Gyllenhaal has since taken over the lead role, but there is a snippet of an aggro new Eminem song in the movie’s trailer, which would indicate that he’s still involved with the project on some level. Also, check out 50 Cent playing Gyllenhaal’s manager. Watch the clip above.