YouTuber Kmac2021 recently gave the world an occasionally grindy version The Beatles' "Blackbird," and now he's back with a reverse version of The Acacia Strain's "Tactical Nuke." The idea behind the song is that every time the riff loops back around to the start, the tempo drops… but to Kmac2021, slow down means speed up and it gets pretty weird.
Doubly so with whatever's going on in the background at pretty much all times. It's also worth watching for the faces he makes.