A Party Song with Punch.
But really, upon giving it several dozen 'second-listens', it doesn't even feel like a GD track so much as feels like it could have been odd enough for him. It fits TaeYang's vocals very well and I thought that hearing him rap was interesting. I don't particularly like how his voice handles a few of the sections, but all of the melodic rap and the powerful vamp sections are just beautiful. The track moves along brilliantly and in all honesty, GD wouldn't sound half as good as TaeYang were he to perform it.
I love that it shows a different side of the Korean underground than most 'underworld' MVs: it gets into the city-scum ideas, showing a dramatic F-You, middle finger raised to authority, sort of rave rather than the glamorous underground parties of videos like Go And Tell Them, or Beautiful. It's also not the obviously set-up-on-a-stage sort of MV that No More Dream was or MaMaBeat or even Warrior. It's a party for the hell of it that's not prettied up, with plenty of aggression to go with it. But it's also gorgeously smoothe, presenting this sort of alternative lifestyle as something that isn't objectionable or problematic, just different. It moves sweetly through gorgeous images of the fires and sunset scenes and promotes passion and fun as the main motivators while still being down and dirty in the streets. All in all I really love it, and I think it's a shame there was no active plot to speak of (particularly as the DeLorean scenes weren't actually all that necessary or relevent . . . ).