Sounds like the rumor of the windmill (warrior skill) damage glitch is true. I've been hit by this on many occasions, and every time my healthbar just goes down into red from a single windmill spin (I'm a warrior with +3k HP, and 863 Armor). It boggled my mind at that time how my health could drop down that fast. But then I was informed by a top player that this glitch exists.

Don't ask me how this glitch could be executed, because I don't use the windmill skill. And I play on an android tablet, too i.e. no scripts.

All I can say is, "Winners don't use drugs". It's a shame, really, that some players (top players included) do resort to this to get ahead.