The beat the song is built on is a 2-bar phrase, played through bars 1-3, 5-7 and 54-56, and 1 more place -- 15.4% 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, snare and kick, counted in thirty-second notes. On its own it scores 54 out of 100 -- a step up -- and the thing that decides that is how many notes a second it asks for.
The whole song is 82 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 81 BPM -- and adds the notes back over 4 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 81, 96, 110 and 125 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, snare and kick, in 4/4 at 125 BPM, counted in thirty-second notes. It is written out above, and it covers 15.4% of the bars the kit plays.
Bars 1-3, 5-7, 54-56 and 58-60. The time is kept on the snare to start with, and it changes 2 times over the song.
54 out of 100 on its own -- a step up. The song as a whole is 82 out of 100. Hard, and what makes it hard is how many notes a second it asks for.