She got some serious air; at some point, the swing's chains were 90 degrees to the ground. With that kind of angle, she got some seriou speed, which isn't easy on that swing. The alleyway is so narrow that it's pretty easy to scrape yourself if you drift a little too far to the side.

Rannie "Photojunkie" Turingan has taken a much better photo of the swing in its alcove; take a gander at this picture of the swing and this one of the rod that holds it up.

"90 degrees." 90 degrees to the ground would be an at rest state.