Listen for a dreadful, tree-shaking shriek of rage. Way out nowhere with a pair of enraged unicorns! -- Piers Anthony, Being a Green Mother (1987) You might believe the whole earth was trembling. For a moment, you might believe the world was coming to an end. When "driven beyond endurance," a unicorn may "scream a cry of rage" so dreadful that it can affect the sanity of an aggressor (Lair2000, "Dragon Facts," 2000). The thunderous, deafening, devouring shriek is indeed bone-rattling and tree-shaking. It sounds like the announcement of an earthquake or a furious whirlwind. From a great distance, the shriek sounds like white noise filling the entire sky. Accounts of unicorns' enraged shrieks in literature include: The unicorn screamed, and the scream sounded like that of a man. -- Josephine, "Diana and the Unicorn" (2004)