The sudden change in speed is the sudden stopping of the person's body when they go SPLAT upon going from a high speed when falling to zero when they hit the ground, which results in an impact upon said body, causing impact trauma and bashed in brains. OK? Don't try this experiment, just take my word for it.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.