Charles Mingus in Norway

I'm always puzzled when people characterize jazz as "laid-back" or "relaxing." May I present some evidence to the contrary? Here is perhaps the greatest Mingus group, courtesy of YouTube. Watch before it's gone:

So Long Eric (Goodbye Eric Dolphy, Hurry Back) (Mingus)
Orange Was the Color of Her Dress, Then Blue Silk (Mingus)
Parkeriana (Mingus)
Take the "A" Train (Billy Strayhorn)

Charles Mingus, bass
Johnny Coles, trumpet
Eric Dolphy, alto saxophone, bass clarinet
Clifford Jordan, tenor saxophone
Jaki Byard, piano
Dannie Richmond, drums

Recorded at University Aula
Oslo, Norway
April 12, 1964

On June 29, 1964, Eric Dolphy, who had stayed on in Europe after the tour ended (hence the title "So Long Eric"), died in a diabetic coma in Berlin.

Charles Mingus in Norway: 1, 2, 3, 4, 5, 6, 7 (YouTube)