Hard to choose hmm
I'm gonna do a top 3
1.
The way they swap between fast and slow moments perfectly in sync throughout the song just baffles me. Donghun has improved so damn much, if you wouldn't know A.C.E I think it would be hard to guess who the main dancer is.
2.
I love how much different parts there are. If they reuse some moves they do it with a new formation or added sth to it, really creative overall.
3.
I don't think this need any big explanation, just look at it and be 'wowed'.