ACROBAT Hoop diving

This is an item developed from "Leaping through Rings on the Ground". It was known as "Swallow Play" more than two thousand years ago because the performers imitated the flying movements of swallows as they leapt nimbly through the narrow mat rings. It was also called "Dashing Through Narrows". The performers are graceful and agile in their movements and demonstrate incredible dexterity.

http://library.thinkquest.org/20443/acrobatics.html