This whole album is a masterpiece, but "Blow Up" is a track that should definitely be better known. It's a vibes-piano-bass-drums quartet session with Herbie on piano that inexplicably was never released at the time, only in Japan over a decade later. It was available on CD for a while in the early 90s, but has since been deleted. The track builds on a steady, understated 4/4 groove anchored heavy bass and creative drumming courtesy of Joe Chambers. Eight minutes of relaxed heaven, with messrs. Hutcherson and Hancock engaging in sublime vibes/piano dialogue over a very catchy theme. Seek out this album any way you can!

9 min., 40 sec.- Improvised!!! Herbie came up with basic riff, followed by brilliant improvisation by Bennie Maupin on Saxes and Bill Summers Percussion, Bassist Paul Jackson and Drummer Mike Clark. They only recorded one take! This song is at first very difficult to pick apart, but once you focus on any one instrument you will have a new perscective on the talent of these virtuoso players. Pure genious.