As of eight years ago, I theoretically have a likely-expired sailboat rental card for one specific lake in Mountain View, California. It came hand-in-hand with a slightly less-theoretical, but equally as expired, windsurfing board rental card, as well as a lot of blood, sweat, and (mostly) tears.

For a few summers as a child, life jackets equipped, a friend and I learned how to surf via a giant, precarious sail in the morning (as well as how to paddle back to shore when we got stuck on the wrong side of the lake, which was most of the time), and how to sail loops for hours in groups of four or five in the afternoon.