Fantastic piece because they use everything from horns to flute and about 20 other instruments in this.
Rumor has or had it that didn't even intend to become a band (we all know what rumor is worth anyway), but that they were art students and they put together a musical piece as part of an art presentation. From there they were off.
The band is incredible in their diversity and use of instruments because back in that day you got little more than keys, cheap drum set and two guitars from most bands.
Bonus track.... "Hide in your shell"