A Madison woman says she was bicycling near Leopold Elementary School early Saturday when she saw a naked man smoking a cigarette. Forty-one-year-old David W. Humphrey was arrested by officers. The woman told them he was fully clothed the first time she saw him, but when she returned down the bike path at about 6:00 A-M he was completely nude while he watched her. Humphrey had put his clothes back on when police contacted him, but they say he made incriminating statements about being nude. He is listed on the sex offender registry.