If you only know Joni Mitchell from "Big Yellow Taxi", then here's a solid wake up call for you.
That chick can jam.
And so can that cat on bass, Mr Jaco Pastorius. In fact, all the personnel on this track are top notch.
Covering a classic Charles Mingus jam, here is one of my favorite tracks. Make sure to stick around for the almost orgasmic ending.
Enjoy.