Alright, you get into shallow waters, ever been to the sea? You can try there. Keep calm and try floating there without moving anything. If you don't panic, you'll float. (I remember my dad used to just lay on the sea, floating, but that could have been because he had such a big belly that it served him as a floatation device) Haha, anyway, do you think you could do that if you ever went to the beach?