第四教 · Dai Yonkyo
O Guruma 大車
Major Wheel
Mechanic
Tori pulls uke forward onto a straight leg laid high across the front of uke's thighs, and uke's moving body wheels around that leg like a spoke around an axle, rotating fully over before landing.
Analogy
Someone sprints for the train and hits a locked waist-high turnstile bar at full speed. Their hips stop dead on the bar, their legs whip up behind them, and they pinwheel clean over the top.
Why it maps
The fixed bar across the hips is tori's outstretched leg: momentum above the bar keeps going, the body rotates around it as an axle, and the wheel completes.