Never Hit a Jellyfish with a Spade

Never Hit a Jellyfish with a Spade. Invaluable advice on questions such as: What are the consequences of hitting a jellyfish with a spade? Should you cross your bridge when someone else is burning it? In breaststroke what do you do with your head when it's underwater? And most crucial of all, what is the best way of establishing a queue when you are the first person in it?