The beat the song is built on is a 2-bar phrase, played through bars 10-13, 16-19 and 33-36, and 1 more place -- 23.2% 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, high tom and kick, counted in thirty-second notes. On its own it scores 76 out of 100 -- demanding -- and the thing that decides that is how many notes a second it asks for.
The whole song is 100 out of 100, so the beat is not the hard part: what costs you is everything around it, the joins and the fills.
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 61 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 61, 73, 85, 98 and 110 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, high tom and kick, in 4/4 at 110 BPM, counted in thirty-second notes. It is written out above, and it covers 23.2% of the bars the kit plays.
Bars 10-13, 16-19, 33-36 and 61-64. The time is kept on the snare to start with, and it changes 9 times over the song.
76 out of 100 on its own -- demanding. The song as a whole is 100 out of 100. Hard, and what makes it hard is how many notes a second it asks for.