STRAIGHT KNIFE ATTACK

Attacker threatens with knife Step aside and block hand Grab wrist and turn
Attacker thrusts with knife.
Step aside and parry the knife hand (this is not a block but rather a guide).
With fingers on the attackers palm and thumb behind, just above the wrist, twist the wrist inwards.
Twist wrist to release knife Kick to chest or face Drop the attacker
Using both hands with the same grip, continue twisting until attacker bends horizontal.
Make a front kick up into the attackers chest.
Continue twisting the wrist until you drop the attacker to the ground.

Animation

Animation of knife defence