With a gut-wrenching wail that rippled from her body, Amber Walcker joined about a dozen screaming people in West Seattle who let their frustrations float away over the Puget Sound. It was just the start. The two group screams that followed, each one longer and more intense, released the pain from Walcker’s recent job loss. Her added stress from raising two young children dissolved as it blended with the sound of lapping water, and a deep sense of calm descended upon her. “I had such a of...