Late Lament has become something of a standard that was first popularized by Paul Desmond.  The Jarret rendition isn’t quite as mellow as Desmond’s and features the gold standard of trios, with each member in clear communication with the other.  Keith Jarret is probably the most ‘athletic’ piano player ever to caress a keyboard. He gets a real workout with Rider, which also features Gary Peacock on bass and Jack Dejohnette on drums.  Sometimes I wonder how Keith can make so many moves and still maintain contact with the piano!