https://en.wikipedia.org/wiki/Alan_Magee https://en.wikipedia.org/wiki/Nicholas_Alkemade https://www.popularmechanics.com/adventure/outdoors/a5197/4344037/
Id imagine that a professional gymnast or diver could hold their form for a dive of this distance but don’t know how or if the average person could
While parachutists can control their rate of descent by spread-eagling or torpedoeing their bodies, in this case it is certainly too short a drop to make any difference over 40m starting from 0m/s.