Good jazz is when the leader jumps
on the piano, waves his arms, and yells.
Fine jazz is when a tenor-man lifts
his foot in the air.
Great jazz is when he heaves a piercing note
for 32 bars and collapses
on his hands and knees.
A pure genius of jazz is manifested
when he and the rest of the orchestra
run around the room while the rhythm section
grimaces and dances around their instruments.

                                      Charles Mingus