well a person do not die AFTER JUMPING and before hitting the ground. He/she dies after hitting the ground as this hitting causes lots of damage to body and body parts. Various bones are negatively impacted due to hitting and it results in fatal injury.
This is a bit morbid. If falling from a great height were to kill you before impact, then every parachute jump ever taken would have resulted in death. I would guess that it’s possible to die from the shock of falling, but it’s probably the impact that usually kills people that jump off high buildings. I don’t recommend trying.