The beat the song is built on is a 2-bar phrase, played through bars 41-43, 45-47 and 49-51, and 9 more places -- 17.3% 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 74 out of 100 -- demanding -- and the thing that decides that is the independence between the hands and the feet.
The whole song is 86 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 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, 104, 122, 139 and 157 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, ride, snare and kick, in 4/4 at 157 BPM, counted in thirty-second notes. It is written out above, and it covers 17.3% of the bars the kit plays.
Bars 41-43, 45-47, 49-51 and 53-55, and 8 more places. The time is kept on the toms to start with, and it changes 11 times over the song.
74 out of 100 on its own -- demanding. The song as a whole is 86 out of 100. Hard, and what makes it hard is the independence between the hands and the feet.