I know lots of "mature" people who still enjoy the occasional turn on a playground swing. There's nothing like the sight of some overgrown child swinging away, lost in a simple pleasure forgotten by so many others. Admittedly, it's not always a pretty sight. Who cares? Well, here's your opportunity to enjoy what is arguably San Francisco's best swing. It's on the first block of Rockridge Drive in Sunset Heights Park. A view of the Pacific and a dangerously high swing arc are things best appreciated by the older swinger.