Quote Originally Posted by hskwarrior View Post
it's in this 5 animal form of chan family choy lee fut

http://www.youtube.com/watch?v=gRFA5ssvsXA
It's not Chan family, it's the Jiangmen line from Wong Gong.
The technique is in the tiger form, tiger and dragon form, 5 animals form and continuous dual kicking form from that line.
In terms of application it's a separating counter against a high attack.