The incredible efficiency and power of foot (ashi waza): Oliver Taza shows how effective a well applied foot can be last night as he won the Enigma belt. Just as we all stumble and fall when walking and we trip over an obstacle; so too, if you can get an opponent moving and trip/block his foot mid step, you can stumble him down to the mat (Sasae Tsuri Komi Ashi). The beauty of the these is their efficiency. When they work it's like a magic trick. Relatively and risk for a great potential reward – that's good jiu jitsu!