Water skiing ! Close by we have a cable skiing setup. You can sit and have a beer at the start and stop area of the circuit. When girls with bikinis finish and take off the life jacket, most often than not the top moved with all the falling and splashing and they don't realize it until they feel the breeze ! During 1 beer, I saw 7 pairs !!
Also when you fall, you get picked up by a rubber duck and taken back to the start. As the boat cruises along it picks up all that fell and all lends a helping hand to dragging the other into the boat. The tops are covered with a life jacket, but most girls just wear bikini bottoms instead of wet suit pants. From the fall, these are sometimes skew, but mostly during the drag up into the rubber duck it gets completely dragged down to her knees. In one hour I saw 2 of those !! (And 2 guys !!) I make sure my string is fastened