Walking up a hill in San Francisco planning images for a book idea I ran across a small park with a young girl enjoying a very tall swing. She swung through the light very quickly so I was lucky enough to catch this arc in only three shoots. If you look carefully you can see her dog at the base of the tree watching over her (father was behind the tree). Olympus E-620 with Olympus 14-40 f3.5-5.6 zoom. f6.3 at 1/100 ISO 200.