Wondering how survivable it would be to dive 30m into shallow water (say 1m) for the average adult. Guessing that age and physique/fitness would affect likely outcomes. So let's assume a 20-30 year old weighing 110lb. How about if thy weighed 170lb with that being more flab? Also guessing the area landed on would affect things but don't know how well the average person could control how they'd land in that situation either. Obviously landing the head would be horrendous, but what about landing on their back? Could someone maintain a pencil dive head first without training for that distance? Is a feet first pencil dive easier to hold form on? So many variables, it's fascinating. Thanks.