As mentioned previously, I love the animations in Champions Online. This short movie gives emphasis to those animations from the point of view of a duel swords hero. The big hitting ability you see in this movie has a 6 second buildup. It is extremely hard to land with all of the knockdowns and interrupts in the game.
It does continue to build while you move though, so with some good timing and a bit of luck you can land it. And it's quite satisfying when it does. :)