The beat the song is built on is a 2-bar phrase, played through bars 5-7, 9-11 and 13-15, and 7 more places -- 22.4% 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 snare, high tom, mid tom and kick, counted in thirty-second notes. On its own it scores 22 out of 100 -- straightforward -- and the thing that decides that is how fine the subdivision is.
The whole song is 67 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 90 BPM -- and adds the notes back over 3 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 90, 105 and 120 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 snare, high tom, mid tom and kick, in 4/4 at 120 BPM, counted in thirty-second notes. It is written out above, and it covers 22.4% of the bars the kit plays.
Bars 5-7, 9-11, 13-15 and 17-19, and 6 more places. The time is kept on the silence to start with, and it changes 20 times over the song.
22 out of 100 on its own -- straightforward. The song as a whole is 67 out of 100: demanding, mostly on the independence between the hands and the feet.