Board Thread:Jobs Board/@comment-49.146.192.48-20131231074513/@comment-6697950-20140101201936

If the non SS move is powerful, for example, The Gleam Eyes is a muscle mountain, then you can match the power of an SS and thus stop it. If you are a human, matching the power of an SS without an SS should be hard. There's a reason why demi-human monsters that can use SSs are considered much more dangerous than other monsters of the same level.

Each skill has a limited reach. I doubt that Asuna wanted to hit Kirito with the skill, as if she got too close with it, the Area would have stopped the attack. I actually don't remember whether the book even mentioned her using a skill at that instance.

Anyway, a skill cannot be interrupted by the user himself/herself after it is activated as far as I remember. I think it may be possible to ruin a skill by intentionally straying from the trajectory, but that would still leave you in a rigid position (I think that was the risk of boosting an SS). That's why Kirito continued to use The Eclipse even though he realised that he made a mistake when he activated it.