Originally Posted by dabnis
Get someone else to go up and then supervise his rescue from the deck
I fell off the roof shoveling snow off of it and was saved by a line secured from above but the climbing jam cleat kind of thing couldn't be loosened with my weight on it. My wife was going to cut the line from the porch but I convinced her to get me a pair of pliers to unlock the jam cleat (don't know the proper term for it) a little at a time. Sounds like Sailor's fix might work even if you hurt for a few days, better than falling through the deck or being plucked off by a crane
Reminds me of the guy who up on his roof doing some work. It was a steep rood so he tied some rope around his waist and tied the other end to the bumper of his car. His wife didn't know what he was doing and at some she decided to drive to the store...you can figger out the rest of the story.