I can remember free diving down to the chair (no equipment at all) along a bouy they had, sitting in it for a few moments, stay down long enough for my friend's to "forget" I was there, then swim up underneath them and drag them down. That was always a good time. Plenty of grillin, chillin, and some freak doing flips off the side of the quarry. Not exactly the closest place to go, but it was far enough away we didn't have to worry about the rents running out and finding us.