Jack woke up he didn't know where he was. Only that he knew he had to get out of wherever he was. He started climbing the hill. Then he saw one of them that held him hostage for so long. He didn't know who it was, all that he knew was maybe she wouldn't notice him. They started swinging on this chain to get over to the other side. Unfortunately for him he was in the middle before he could move he flew backwards, and she grabs him. He's caught on the chains struggling to get free. But, that's not the worst of it. There's a steep drop up ahead and there's nowhere safe to land. The drop is maybe 50 ft. The chains he knew were not going to support his and her weight. He knew that they were in trouble. If they survived this drop, they would get hurt. SNAP! Uh oh, Jack looks up and sees the chains one by one starting to break. It's halfway down. Their in the middle of the hole. It snaps all the way. Their falling. Still, caught in the chains Jack falls first. CRASH!
Before the fall:
All Jack could think about as they were falling was, "Am I going to see Kate ever again?" Only time would tell.
After the fall:
It knocks the breath out of him and falls unconscious. The woman wasn't hurt at all! A fifty feet drop but only a scratch on her face. She looks at Jack kicks him and walks away. "So, much for bringing Shephard to him." Jack's laying there in a little pool of blood, far away for any of the group to find him.