I've heard vague rumors of this bug, do you have any more info on what causes it/how to perform it?
Idle curiousity.
I'm not sure why it works, but it does. You just need to be an Orc Rogue with the hemmorage talent. Just using that gives you 4 combo points, there is no exploit or trick involved with it. If you were to have that, it'd be insane. You'd be able to land so many eviscerates it's not even funny.