just asking u guys, how can u defend yourself if your in a full mount of a jiu-jitsu expert? or what if he grabs u by the legs & try to put u down?
ive experience sparring with a jiu-jitsu, its hard especially when he tried to take me down to the ground, doing the arm bar or the ankle lock.. how do u counter that moves?
If someone's face is within your reach there is no reason you shouldn't be able to figure a way to get back up. However, if you're talking about defending it in a friendly way (as in no thumbs embedded in eye sockets), nikyo can be implemented well from your back with a little practice.