Thok was an orc chieftain that went through the Dark Portal to Azeroth. He fell down but wasn't hurt. He found many good things to eat on the other side. He also found a village. He killed the humans in the village and stole their food. As a leader it was up to him to document the assault, so that the stories of battle and victory would be told. He tried to write down what he had done but couldn't continue. Writing caused his head to hurt. While he was a fine leader in war, he lacked the ability to convey those actions with written words.