Since I do accident investigations, I can tell you the truth about what happens in a hope that someone will perform a better preflight inspection and be more alert when operating their aircraft. First you must understand the human body is mostly water. So think of you body being like a water balloon in one piece. Now if you drop it on the ground what happens? It explodes, same as the cell in you body when it has a sudden stoppage. The cells explode and the human body turns to goop for a better word depending on the speed you were traveling at the sudden stoppage. At slower speed again depend on if you are wearing a seat belt with a shoulder harness and you survive you will have a lot of bruising where the strap held you in place. If you do not have a shoulder harness you 25-pound head will continue to move forward while the seat belt holds you in place. Two things could happen one you are lucky if you head bounces off the instrument panel or two you head continues ripping off of your b