Few, if any, artists were as erratic and charismatic as the late Ol' Dirty Bastard. He was genuinely and relentlessly off-the-cuff, entertaining anyone within earshot.
In the clip above, ODB is joined by Busta Rhymes during a cypher from 1994. While the rhymes aren't freestyled (Busta rips with "Woo Hah!! Got You All in Check" while ODB recites his "Brooklyn Zoo II" verse), it's still an awesome clip to watch as the two hungry MC's go at it.
Also check out Busta Rhymes on Complex TV's The Combat Jack Show Ep. 1 below.