Wow, that's strange. There are ALWAYS walkers, boulderers, and hikers on Mt. Rubidoux. It seems really odd that someone could be trapped anywhere on the hill and not be discovered and/or be able to get someone's attention. Glad he was found in time.
I absolutly loved one of the comments below the story saying that the guy should have had "water, food, shelter and fire tools and a signal device of some type" with him before going out into the wilderness that is Mt. Rubidoux.