第三教 · Dai Sankyo
Tomoe Nage 巴投
Circle Throw
Mechanic
As uke pushes forward, tori drops straight onto their own back, plants a foot on uke's belly, and uses uke's charging momentum plus the extending leg to sling them overhead in a full circle ('tomoe' is a swirling comma shape).
Analogy
A parent lies back on the grass playing airplane: foot on the kid's tummy, hands in hands. But this time the leg extends with a whoosh and the kid actually launches, soaring upside down clear over the parent's head, a full loop in the air.
Why it maps
It is the same machine: the parent's planted foot is tori's launching leg, the held hands are the grips steering the circle, and the kid's forward lean is uke's momentum being redirected overhead.