"Searching for a bike she could 'borrow' to get to Golden Gate Park, she felt the sound before her ears registered it: an earth-shattering blast that rattled windows, set off every car alarm on the block and sent her crashing to her knees. For a few moments she was too deaf even to think, and then she realized what she had just heard. The Gjallarhorn. The herald of Ragnarok, the Last Battle, the end of the world."
(from Susan Krinard's contemporary fantasy novel "Battlestorm")