The beat the song is built on is a 2-bar phrase, played through bars 25-26, 29-30 and 33-34, and 9 more places -- 16.7% 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 thirty-second notes. On its own it scores 66 out of 100 -- demanding -- and the thing that decides that is how many notes a second it asks for.
The whole song is 81 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 5 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 81, 98, 115, 131 and 148 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 hi-hat, snare and kick, in 4/4 at 148 BPM, counted in thirty-second notes. It is written out above, and it covers 16.7% of the bars the kit plays.
Bars 25-26, 29-30, 33-34 and 37-38, and 8 more places. The time is kept on the silence to start with, and it changes 11 times over the song.
66 out of 100 on its own -- demanding. The song as a whole is 81 out of 100. Hard, and what makes it hard is the independence between the hands and the feet.