This video contains a small guide on how to make the tiger boss in Zul'gurub switch to tiger form without killing his two adds which you normally have to kill at the same time as the boss first form.

Tips:

1.This can take some tries to get it right.

2.Clear the two packs of mobs before start.

3.This can even be done by rogues.

Song: Chimaira-The disappearing sun