The video below captures the fun of glider flying, in particular the sport of 'ridge-running', using only the thermals rising up from the hills to maintain altitude, plus the speed of one's passage. I apologize for the damnfool soundtrack someone added to the video. I wish people would learn to leave great video alone, and not muck it up by adding such tracks, but I guess that's too much to ask . . .
Even despite the soundtrack, that's some wonderful footage!