What is the highest dive by human?
The deepest dive on record is 1,082 feet (332 meters) set by Ahmed Gabr in 2014. That depth is the equivalent to approximately 10 NBA basketball courts aligned vertically. In terms of pressure, that’s about 485 pounds per square inch. Most people’s lungs would be crushed at that depth.
Is hitting water like hitting concrete?
Pressures caused by breaking the surface make water act more solid on shorter timescales, which is why they say hitting water at high speeds is like hitting concrete; on those short times, it is actually like concrete!