After crossing paths at a party, a Cape Town teen sets out to prove whether a private-school swimming star is her sister who was abducted at birth. BLOOD & WATER returns with even more secrets September 24. Only on Netflix. | Netflix

When someone hits the water flat at high speed, the water doesn’t “give” the way people expect. At extreme heights, water behaves more like a solid surface. The sudden stop creates massive deceleration forces on the body. Blunt trauma: The chest, abdomen, and pelvis absorb the impact, which can bruise or tear internal organs like the lungs, liver, spleen, or intestines. Breathing injuries: The force can cause lung contusions (bruising), air leaks, or even temporary inability to breathe due to sh