Madlib showed up in London yesterday and announced a last-minute show last night at the Dance Tunnel. Details of the show became available yesterday morning, with scheduled guests that included Mr. Beatnick, Stones Throw's Egon, Paul White from One Handed Music and Benji B. from Radio 1, and, according to FactMag, the line for the show was massive an hour before the scheduled start. But the few who did get in got even more than they'd hoped for, when reclusive rapper/producer DOOM showed up—prefacing the long-awaited Madvillainy 2 perhaps?—as well as Yasiin Bey, a.k.a. Mos Def. Mr. Beatnick was kind enough to capture a Vine of Mos rapping over Madlib's beats (below), while Rappcats snagged the photo of DOOM and Madlib above.