See? It's a big tricycle,and you sit in a swing on it, and swinging pushes the pedals.
It's hard to find good help these days. They were all out of creepy-voiced hunchbacks, but this tall Swiss girl really wanted the part. What the hell, y'know?
Stably and firmly holds the bicycle: check.
The seat hangs at a decent height, and there seems to be room for pretty good swinging.
Aw, but the turning radius is about a mile. Crap.
Well, a little redesign now that the basic idea is realized and looks doable.
-Dr. Science