Free World of Warcraft Bug: Polymorph Bug

A player, after being sheeped (polymorphed) a second time is able to control their own movements, regenerate health, and attack other players.
The effect occurs when the second polymorph's effect and the first's are overlapping and causing the diminishing returns on the negative effect of the polymorph (ie, you're a sheep), but the visual effect (you look like a sheep) still last the full duration.
The player must be polymorphed a second time while still a sheep for this to work.