Skydiving Myth: If you’re ever knocked unconscious in free fall, you’re dead
Another common fallacy; it’s understandable how this could be perceived however. Think about it… if you’re ever knocked out by a mid-air collision with a fellow skydiver, who’s going to deploy your chute? Well, most skydivers jump with a device known as an Automatic Activation Device (AAD). It’s a small, air-pressure and speed sensitive unit that will cut the closing loop of your reserve chute so that it deploys automatically. They are usually set so that if you drop below 750 feet above ground level at over 78mph, it goes off. If you are unconscious, your landing will likely be rough and you may injure yourself or perhaps still die, but landing without any chute at all would be far worse.
I knew there were backup chutes, but I guess I never thought about what would happen if you were unconscious and couldn't pull yours at all. I bet that would be a horrible landing, but at least you wouldn't immediately drop to your death.