Since Tomm chimed in to report that his chain is intact, I've been wondering about the freewheel, too. Seems quite a few posters have the same idea.

And sometimes weird stuff happens. A few weeks ago, I was riding down a long hill and gently shifted the RD to a smaller cog -- and the whole drivetrain locked up. FD had somehow slipped downward and the cage caught on the big ring. If it had happened under higher torque, I would've gone ass over teacups. As it was, I just coasted to a stop.

OT: Tomm, how are you holding up? Ribs still hurting a lot?