Ryusenkyaku

The Ryusenkyaku (龍旋脚, "Spinning Dragon Leg") is one of Ken's special attacks exclusive to the Capcom vs. SNK series.

Description
Executed by performing a  reverse Shoryuken motion ? and pressing kick, Ken performs a wheel kick at the opponent as he lands on his back. The height of the kick is determined by the kick button pressed:  the light kick hits faster; especially when up close, while the heavy kick covers more range. This attack is similar to Sean's Ryubi Kyaku and Abel's Wheel Kick.

Tactics
The delay afterward of this move has been shortened when it is blocked on the ground, but Ken is vulnerable in the air for much longer. Opponent cannot Safe Fall after being knockdown by this move.