Lockdown video lesson #15 is all about the Kwan-Sao, a rotational movement which can be applied to one or both of your arms.
First introduced within Section 1 of the Siu-Nim-Tao form, Kwan-Sao moves between the Cross-Body Tan-Sao and the Lower Bong-Sao positions, in a way which allows for rapid recovery and even a method of breaking grips.