Hey JazzyVee,
Good find! It was a great experience playing with Bozzio and Machacek, those two are monsters! This piece is mostly an adlib up until the end section which is part of a piece called "Strafe" written by Alex. For the curious, I've attached my old chart below (I hope Alex doesn't mind). Surprise, it's all in 4/4/ time. HA!! The arrangement was played this way because the gig was billed as a "drum off", so this version is more of a drum feature with an organized coda.
We begin at the bottom of page 2 with "open, free time, over C". That happens until Terry starts to play a tempo. Alex and I recognize his first kick drum (at 1:35 in the video) as the downbeat and from that point we're all feeling 4 and 8-bar phrases together. At some point we then fall into the drum breaks - also scratched out at the bottom of page 2. Round and round on that rhythmic figure with 3 different rotating sets of bass notes (it can never just be easy, right?) Then on cue we take the DS and we're into the chart which starts with an open vamp again. On cue is letter A or the "head" which sounds tremendously complex but is actually still in 4/4. Two 8-bar phrases, then the held note/trill beginning on beat 2 of rehearsal letter B, then Terry plays a hi-hat on the downbeat of the last bar and we all play that last figure - with any pitch.
I know, that is some crazy music! Alex writes very advanced, technical, and "heady" music. And Terry's compositions lean that way too, but he has a soulful groove which I really dig. I'd enjoy playing with him if he only brought a 3-piece kit, but he also makes a lot of music with his giant rig. He's really got a unique voice.
Cheers to everybody. Hang in there, brighter days ahead.
Jimmy J