The beat the song is built on is one bar, played through bars 1, 3 and 5, and 24 more places -- 21.6% of every bar the kit plays. This one moves around more than most: the beat is where to start, not the whole job.
It is played on crash, ride, snare, mid tom, floor tom and kick, counted in thirty-second notes. On its own it scores 79 out of 100 -- demanding -- and the thing that decides that is how many notes a second it asks for.
The whole song is 86 out of 100, so the beat is most of what the song asks for. Get it clean and the rest follows.
A part this hard is not learned by playing it slowly and hoping. The room opens it on its simplest reduction -- the timekeeper alone, at 85 BPM -- and adds the notes back over 5 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 85, 102, 119, 137 and 154 BPM, and the gate at each one is 8 loops in a row with no wrong note and no wobble in the time.
PRACTISE THIS BEAT →A one-bar groove on crash, ride, snare, mid tom, floor tom and kick, in 4/4 at 154 BPM, counted in thirty-second notes. It is written out above, and it covers 21.6% of the bars the kit plays.
Bars 1, 3, 5 and 7, and 23 more places. The time is kept on the ride to start with, and it changes 6 times over the song.
79 out of 100 on its own -- demanding. The song as a whole is 86 out of 100. Hard, and what makes it hard is how many notes a second it asks for.