So you thought you had seen everything silly in swimming?
Try this (from the good people at goswim.tv) – Overhead Sculling.
Why? It is possible to swim and get somewhere but still to wonder why others go faster. One good reason is that we feel we are connecting with the water, though in reality we are windmilling. This drill will really test your connection with the water and isolate the hand movements necessary to make progress.
Take the invitation to use a pull buoy seriously.