Grom did that with the second helping of Fel steroids, Garrosh did that with an army (that he repeatedly tried to empower with some kind of magic), Broxigar did so with an axe empowered by Azeroth itself and Varian did so with the power of gravity.
Your very own example of a Warrior going "super saiyan" got flat out disenchanted by a Warlock 20 second later.