whirlwind kick is a tornado kick with both legs extended in sequence. To do a right-leg whirlwind, spin around as you would do a tornado, but extend your left leg as high up as possible before finishing with the right. Usually I perform this with double outward crescent kicks but it probably looks better w/ double round house kicks. [Greggy]
This type of kick is also referred to as a "helicopter kick" in which both legs are extended out when you spin. If you want a visual of it rent the movie BloodSport with Van Damme. He does it in the end fight, and he does it perfectly.
This kick if done right can looks so good, even tho the tech side is not great i find it one of my favorites. because if you can get great hieght and stall out the rotaion at the peak and stick the landing then it is very impresive.
