The beat the song is built on is one bar, played through bars 2-4, 6-8 and 18-20, and 4 more places -- 15.9% 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, ride, 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 94 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 80 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 80, 96, 112, 129 and 145 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 and kick, in 4/4 at 145 BPM, counted in thirty-second notes. It is written out above, and it covers 15.9% of the bars the kit plays.
Bars 2-4, 6-8, 18-20 and 22-24, and 3 more places. The time is kept on the hi-hat to start with, and it changes 21 times over the song.
100 out of 100 on its own -- hard. The song as a whole is 94 out of 100. Hard, and what makes it hard is the independence between the hands and the feet.