Let's say you are in the air 500 meters above flat land and you have no parachute. Which pose - forming a sphere or spreading all extremities to make yourself as wide as possible or other - is the most appropriate to cause the highest likelihood of survival?
- in the air
- right before impact
In other words: which body position causes the least amount of negative acceleration in this context?
PS: As a side-question: Which body position enables you to control the direction of flight to control your angle of impact and make it as flat as possible?
My take: In the air make yourself as wide as possible and control direction by weight displacement. Right before impact, form a sphere when having a flat angle of impact and let rolling take care of the change of kinetic energy into heat and potential energy.