Knife DisArm
Stopping a razor sharp blade that has been launched towards you at a reflex speed fueled by anger and bad intent, is not as easy as stopping a plastic knife in a cozy training room that is being meekly lunged at you by a training partner who fears being scratched by his cat! No matter, you MUST have a planned go to that you can use if you ever have to face a real blade.
Here's a good technique that allows you to evade and re-direct the direction of the blade while simultaneously applying pressure to dislocate his elbow. Check it out!