So is "Mosh", as J-Shep says, the most important thing Eminem will ever do, or is it just the Beastie Boys conscious-move that everyone has been waiting for since he first started gay-bashing? We won't know for another six days. Is the song any good? I probably won't know that for a long, long time. In the meantime, it's a jarring, exhilarating spectacle. That anger in his voice is real; game recognize game. Welcome aboard, Marshall! (Go to hiphop.com to watch the video. Now.)