Please explain how is King executing Oomori Karyudon while staying stationary in air without falling.
Here, we have King jumping off the cliff in base, turning into Zoan to fly back and immediately turn into base again, using Zoan solely to fly back. How is it necessary, if his base can fly in the first place?
That's why you have dozens of panels of Zoan King flying, not a single one of base King doing so.
Both base King and Zoro stood mid air for a brief moment benefitting from the momentum that brought them into mid air in the first place.