The beat the song is built on is a 2-bar phrase, played through bars 17-23, 25-30 and 33-39, and 17 more places -- 18.7% 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 crash, hi-hat, snare and kick, counted in thirty-second notes. On its own it scores 65 out of 100 -- demanding -- and the thing that decides that is the independence between the hands and the feet.
The whole song is 83 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 124 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 124, 146, 168 and 190 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 and kick, in 4/4 at 190 BPM, counted in thirty-second notes. It is written out above, and it covers 18.7% of the bars the kit plays.
Bars 17-23, 25-30, 33-39 and 41-46, and 16 more places. The time is kept on the silence to start with, and it changes 29 times over the song.
65 out of 100 on its own -- demanding. The song as a whole is 83 out of 100. Hard, and what makes it hard is how many notes a second it asks for.