Yes. All participants (parachute and control) jumped from vehicles with 0 speed and 0.6 meters altitude ;-) I'm not joking. This is the actual study. I

Yes. All participants (parachute and control) jumped from vehicles with 0 speed and 0.6 meters altitude ;-) I'm not joking. This is the actual study. It shows how studies can be valid statistically and shows nothing usefull for the real world.