I often do my warmup on a rail-trail before turning onto the road to do some hill work, and today I saw the strangest things on the trail. Two people, each "riding" (it's hard to figure out what to call this activity) a thing that looked sort of like a scooter, but taller, and with three wheels instead of two, one up front and two behind. There was that same tall handle that a scooter has, but their feet stood on platforms over each of the rear wheels. There wasn't any sort of chain drive mechanism that I could see, but they seemed to make the things move by steering the handle from side to side. I guess the physical benefit is probably to the core muscles since it seems to be a repetitive twisting motion, sort of like kayaking.

The woman had a tiny dog in her backpack--he seemed to be smiling!

Anybody ever seen such things before? I probably should've slowed down and talked to them, but I really had a good pace going and didn't want to interrupt it.