would putting a bubble stream below the landing spot help with cushioning from a jump this high? like bubble bath jet streams that create air bubbles that push up to the surface.,(reply>), Adding a stream of bubbles would greatly decrease the density of the water (air is close to 1000 times less dense than water) so it would certainly reduce the forces involved when impacting the surface, but due to that reduced density you would drop to the bottom of the pool like a stone. Meaning that the pool would need to much deeper and you would need to be well trained to remain properly oriented and then swim out of the stream of bubbles before attempting to swim back up to the surface. There's a good chance that an untrained person who accidentally fell from a high board into such a deep pool would be in serious trouble. <br>Thousands of seafarers have lost the their lives going down with their ship even if they managed to escape into the water before it capsized or broke up, due to the release of trapped air and other gasses from internal spaces turning the sea into a froth of bubbles in which it is impossible to swim up to the surface, especially when wearing waterlogged clothing and shoes/boots.,(reply>), @Inquisitor Walmarius thats good because that means your impact is spread out across a longer duration of time:<br><br>Force F = ∆p / t<br><br>Larger the time t, smaller the force F,(reply>), im positive that it would make you go deeper faster, you are loosing up resistance in the water with the bubbles as many will pop and leave a hole of air in the water with no resistance upon contact with the diver, so more depth to stop the diver before boyancy and upstream returns. Effectively making the dive a lot more dangerous.<br><br>i am basing this answer on the observed physics from my aquarium when feeding with pellets. they sink faster where there are air bubbles.,(reply>), it does! i think they do that sometimes, ive seen a few of her tiktoks,(reply>), I think it would but you would be landing through a mix of water and air so you wouldn't slow down as quick, meaning the water would need to be deeper.