Is this some kind of 'thing'. I embarrassed myself by panicking (as I thought one had drowned) turns out they were doing some breathing thing. (underwater holding on to the bottom of the ladder). There are also ones who have full flippers, mask and gloves things, they are annoying as they take up a whole lane made for two. Today there was even one turning slow somersaults up and down the lane! - the one I was in and agin it took up the whole thing and was most disconcerting while swimming lengths as didn't know if they were going to 'pop up'!
This is an adult only gym pool and there is a sign saying about generally it being for well, swimming lengths, is in not reasonable to expect people to, well do that and not all this weird stuff? 