This is the stance dance macro that allows you to take advantage of the Bezerker rage ability from Bezerker stance and immediately jump back to defensive stance using the same hotkey with merely two clicks. It's a great macro for tanking in any situation where your opponent's got fear on his mind. If I recall, I believe the first click turns the macro into Bezerker rage, the second click uses the bezerker rage ability, and the third click returns you to defensive stance. 

# show Berserker Rage 
/cast [stance:3] Berserker Rage; Berserker Stance 
/stopcasting 
/cast [equipped:shields] Defensive Stance