新兵日記之特戰英雄第5集ep5-3 Ground Traning-Landing

跳伞训练 Ground Traning - Landing
Difference between:
SIN 3 sec count, TW 4 sec count.
SIN - Back Right / Back Left Landing,
TW - Forward Right / Forward Left Landing.

新兵日記之特戰英雄第5集ep5-3
http://www.youtube.com/watch?v=Fw9PPyMSpj0&feature=related