I can't think of a scenario where I would deliberately jump off a ledge.
My reaction also. A four foot jump off a ledge is asking for trouble even when you are not by yourself.
It sounds like she kept her head and made the best of her few resources. I wonder if she had a cell phone with her, and if so, if there was a signal. Even leaving a note with the hotel desk on where she was hiking and when she expected to be back would have helped.