There are millions of treacherous moments. Driving along Highway 1, I will see a peeling wave. Or I reach the fork where two roads meet near Rancho Nicasio, where we veered to the left in carpool. A shooting star on a still night at the crest of Olema Hill. With friends, I hear a good joke—one that Nic would appreciate. The kids do something funny or endearing. A story. A worn sweater. A movie. Feeling wind and looking up, riding my bike. A million moments.