In order to properly utilize the capabilities of a defensive knife, you should be aware of the effects that a blade can have on the human body. Michael Janich demonstrates the two general types of defensive knife cutting, ballistic and pressure cutting. Ballistic cutting is when the blade is in motion before it makes contact with your target. Pressure cutting is when the blade is already in contact, and you simply move your arm or all of your body perpendicular or parallel to the muscle you are cutting. Both of these are effective, but pressure cutting will generate a huge amount of force on your target and should deal a devastating blow.