Ann Dwyer didn’t see the sneaker wave that almost killed her and her granddaughter on a calm October day one year ago. Dwyer, a retired Eugene psychiatrist, and her granddaughter had stepped onto the big sandy beach where the Yachats River flows into the Pacific. They arrived a little after noon, about 45 minutes after low tide. Dwyer’s granddaughter was chattering about jumping over little wavelets coming up on the beach and Dwyer was looking down at the 4-year-old child.