i can't by any means take credit for finding this, a friend who saw it noticed elsewhere pointed it out to me, but the rhythm of the drums of liberation is in the party scene at the end of skypiea. it's the same sound effect as whenever they're being denoted in the gear 5 sequence: ドンドットット/dondottotto. there's even the little music notes at the end in both scenes!

you turn that neck the correct direction right this fucking instant

easily one of my top favorite covers