Di Gong Jia Quan - Shi Yan Ao

Wai Jia: The Kung Fu Forum Shaolin Kung Fu
1

http://www.youtube.com/watch?v=M1vlbBZk2Zo

I know that in Wudang they also had to practice like this.

http://www.youtube.com/watch?v=PxirN3V6gL8

Best regards,
Xian