The beat the song is built on is one bar, played through bars 23-25, 35-41 and 43-45, and 1 more place -- 22.7% 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 hi-hat, snare and kick, counted in sixteenth notes. On its own it scores 67 out of 100 -- demanding -- and the thing that decides that is the independence between the hands and the feet.
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 102 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 102, 120, 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 one-bar groove on hi-hat, snare and kick, in 4/4 at 157 BPM, counted in sixteenth notes. It is written out above, and it covers 22.7% of the bars the kit plays.
Bars 23-25, 35-41, 43-45 and 83-89. The time is kept on the hi-hat to start with, and it changes 9 times over the song.
67 out of 100 on its own -- demanding. The song as a whole is 82 out of 100. Hard, and what makes it hard is the independence between the hands and the feet.