Remember the Incredible Hulk TV show with Bill Bixby and Lou Ferrigno? It was an episodic TV series in the 1970s featuring a timid scientist and his monstrous alter ego. Whenever Bruce Banner (Bixby) got angry, he would turn into a rampaging green monster (Ferrigno in body paint), oblivious to reason and bent on destruction. The giant beast was so focused on his own rage that he lashed out at anyone and anything that had the misfortune to be near him.
Fortunately that is just fiction. In real life we don’t turn green when we let anger control us. The rest is fairly accurate, though. It may not manifest itself physically as it did with the Hulk, but anger does transform a person in some very unpleasant ways.