[quote=@Little_ninja]
But, throwing a rock was different, since there was a skill activated, <<Blade Throwing>> or other names it goes by
It required the pre-motion before throwing
[/quote]

That still wouldn't make any sense, because Blade Throwing is a learned skill, and Kirito was level one at the time. If he can do that, then why can't someone else use a shield bash skill with a pre-motion?