How to do the knee strike in street self defense

The knee strike is a very simple but effective maneuver. It is even more powerful if you can get the attacker around the neck and pull his head toward you while doing the knee strike. This is the same science as a car crash. Your attacker won't know what hit him. The same knee strike is used in different martial arts, but is effective in simple self-defense. Just watch this self-defense video tutorial on how to do a knee strike.