Yesterday as it was getting dark and we were finally able to spot a hotel on the horizon, Ken stopped and looked at me with big worried eyes. He informed me that we might have to find a bike shop because something was really wrong with his gears. We started pedaling again and I noticed small pieces of something flying out from under his trike. So Ken got some pliers out and laid down on the ground and a few moments later came out with this:
A pannier strap had gotten caught in his chain. No bike shop needed. Whew!