Just installed a deda dog fang after getting sick of dropped chains and had my first experience of it in action yesterday. So was naturally shifting from big ring to small and the chain just jammed. Eck, I thought, and stopped by the side of the road and had a look. It all looked fine, gave the pedals a spin, and it worked perfectly. So is this how they work? The chain jams up against the chain catcher, and then you wait and pedal again and it's fine?