Good morning, NFC West.We wondered over the weekend whether Eric Mangini's hiring might threaten any current San Francisco 49ers assistant coaches. We could not have known many of those coaches would actually be threatened within 24 hours -- not by Mangini, but by a falling oak tree at a lawn-bowling club in San Jose, a 12-mile drive from 49ers headquarters.Around the NFC West: June 2, 2013Holly Rathman, wife of 49ers assistant and former Pro Bowl fullback Tom Rathman, reportedly saw the tree falling and warned others just in time.