It’s usually done under influence - not drugs, but the high of emotions, self-talk spiral, setting one’s mind to it, etc, to overcome the will to survive. A sudden shock can break it all down. And that kind of shock she had, and pain, and danger, would make one default to instincts and either climb out yourself or follow the command of others. She was probably unavailiable for a hour or two after it happened, still shaking and afraid of what happened and what did not.