The beat the song is built on is a 2-bar phrase, played through bars 12-14, 16-18 and 20-22, and 6 more places -- 23.9% 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, hi-hat, snare and kick, counted in thirty-second notes. On its own it scores 100 out of 100 -- hard -- and the thing that decides that is how many notes a second it asks for.
The whole song is 99 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 86 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 86, 103, 121, 138 and 156 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 2-bar phrase on crash, hi-hat, snare and kick, in 4/4 at 156 BPM, counted in thirty-second notes. It is written out above, and it covers 23.9% of the bars the kit plays.
Bars 12-14, 16-18, 20-22 and 28-30, and 5 more places. The time is kept on the toms to start with, and it changes 7 times over the song.
100 out of 100 on its own -- hard. The song as a whole is 99 out of 100. Hard, and what makes it hard is how many notes a second it asks for.