The beat the song is built on is a 2-bar phrase, played through bars 1-2, 4-5 and 7-8, and 3 more places -- 15.4% 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 crash, ride, snare, high tom, mid tom and kick, counted in thirty-second notes. On its own it scores 82 out of 100 -- hard -- and the thing that decides that is how many notes a second it asks for.
The whole song is 97 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 55 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 55, 66, 78, 89 and 100 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, ride, snare, high tom, mid tom and kick, in 4/4 at 100 BPM, counted in thirty-second notes. It is written out above, and it covers 15.4% of the bars the kit plays.
Bars 1-2, 4-5, 7-8 and 80-81, and 2 more places. The time is kept on the ride to start with, and it changes 8 times over the song.
82 out of 100 on its own -- hard. The song as a whole is 97 out of 100. Hard, and what makes it hard is the independence between the hands and the feet.