A 3 min clip I've put together from the HAK (Hideaway knife) training vid with FMA expert Southnarc. I've got a couple of these blades and they are an absolutely brillant tool and well worth investing in. They were designed by a lady called FrontSight primarily for ease of use and retention during attacks. I think that they are an absolute must for any JKD/ FMA-minded people- but ultimately they are light and easy to carry and come with an innovative range of attachment systems.