Swimming coming along nicely and I can now maintain front crawl for a number of lengths. My technique appears to facilitate the development of an amusing and diverting phenomenon. The “Swimming Cap Fart”. As I plod up and down the pool, a proportion of the air I breathe out under water seems to find its way into my cap, resulting in a “Venteuse” like protuberance on the crown of my head. When firmly and steadily depressed this expels around the ear flaps producing a very pleasing farting noise resulting in consternation amongst the other swimmers as I look around accusingly.