been there, done that. Had a new crew helping me disassemble my old 5.2. I was working on the rudders as he was struggling with something up on the bow. Suddenly I heard a wooshing sound and a simultaneously muttered "uh oh" from up front. I dove out of the way as the mast came crashing down. Fortunately no damage.

Of course, a pin and ring may not cure you from this possibility.