The beat the song is built on is a 2-bar phrase, played through bars 3-10, 43-46 and 105-112, and 1 more place -- 21.1% 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, high tom, mid tom and kick, counted in thirty-second notes. On its own it scores 65 out of 100 -- demanding -- and the thing that decides that is how many notes a second it asks for.
The whole song is 74 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 104 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 104, 123, 141 and 160 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, high tom, mid tom and kick, in 4/4 at 160 BPM, counted in thirty-second notes. It is written out above, and it covers 21.1% of the bars the kit plays.
Bars 3-10, 43-46, 105-112 and 125-128. The time is kept on the toms to start with, and it changes 15 times over the song.
65 out of 100 on its own -- demanding. The song as a whole is 74 out of 100: demanding, mostly on the independence between the hands and the feet.