Rising Front Knee

This is just a simple knee to the groin.

But a lot can happen.

I have to be at punching distance for it to work.

Too close or too far away and I will both miss and leave myself vulnerable.

I make a point of keeping my hands up while striking.

Also, if I am close enough to use this I am close enough to have it used on me.

And once I have struck I have to be ready to follow up in case my blow is not enough.
http://youtu.be/SYf6_0r53XQ
Without prejudice