Thems in-walk troll house. Troll say, "Out mans!" But they wham-a-wham troll rocks. So troll wham, too! – Rock troll known as Wham-a-Wham
Rock trolls come across as dim-witted, ponderous, slow - stupid, to be frank. It's easy to dismiss them - and even easier to enrage them. When this happens, one's best bet is to run as fast as possible, for an angered rock troll is as deadly as a thundering landslide. The truth held in the case of the massive rock troll known as Wham-a-Wham. His every blow struck like a battering ram - meaning one needed either avoid them entirely or protect oneself with the Quen Sign. Its hard skin meant it was near invulnerable to sword strikes - especially those dealt from behind, where its rock armor is the thickest. The only hope for defeating it lay in taking advantage of its typical troll slowness - especially if further exploited using the Yrden Sign.
A certain set of Skellige miners learned first-hand just how dangerous rock trolls can be. Ignoring all warnings, they started to mine a rich silver vein in the cave which Wham-a-Wham called home. They died soon thereafter - crushed or torn to rough bits. This time, a troll's killings were a justified act of self-defense - after all, the witcher reasoned, every troll's cave is his castle.