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