Yun Bee “Flying Swallow.”  
The movements in the form, mimic the darting and swooping flight of a swallow, fast, determined, and precise. Achieving third Dan is a considerable feat and is acknowledged as a grand accomplishment. 

Yun Bee is another explosive form from start to finish, it is relentless and requires the practitioner to "fly" beyond what they think may be their limit. The form teaches blocking and striking simultaneously, feints, and raw power.