This was from the musicians' point of view, in a single take, recorded as McLaughlin began riffing in the studio while waiting for Miles; it was picked up on by Henderson and Cobham, Hancock was ushered in to jump on a Hammond organ (he was passing through the building), and Miles rushed in at 2:19 and proceeded to play one of the longest, funkiest, knottiest, and most complex solos of his career.
http://www.youtube.com/watch?feature=player_embedded&v=D_w3-Bx9rnI