Like this:
https://youtu.be/9r_EMogREgA?si=FpdJbokH-2AZZJ0L
Seriously? What I see there are two characters doing side rolls every now and then, moving from one side to the other (quite unrealistically, by the way), and even some weird running animations (sometimes it looks like they're skating).
According to him, is one of the best combat systems in an MMORPG.
On the other hand, it has been shown that this type of action combat is disastrous for large-scale PvP, both in terms of gameplay and performance.