Ive been at Ju jitsu for 6 years, im experience in Ground work and Standing, Let me just say that we are talking street fighting here, ive been in a few so heres my 2 cents, Your talking about a street fight, you will never know what your enemy is thinking, so if you think you can get a good shot in with your knee on someone shoots go right ahead, take into account an experienced fighter is gonna shoot when hes already touching you ( or atleast I would) by time u got your knee off the ground your half way to the floor. As for multiple opponents and weapons , if a guy pulls out a knife a gun or a bat, your better off just walking away, is it really worth death? Or worse, total paralysis ( in my eyes thats no way to live) Multiple Oppenets, well this is what I did, I threw one guy and immediatly got ontop of him and put his arm in a lock, and threatened to break it unless his friends backed off took me a total of 3 or 4 seconds to lock him, and hell that worked, his buddies seemed to care enough about his health to back off.

To be a good all around fighter you will need to know how to deal with every range of attack from kicking range to punching range to knee and elbow range clinch range yes and even ground range. Not many stand up fighters are prepared for a grapplers charge(shoot) thats why most times grapplers succeed in taking down a stand up martial artist. One technique that I learned to be very effective against a grapplers charge is called the sprawl learn it practice it and you will have a better chance against a grappler. Also dont get me wrong Im not against grappling as I have taken BJJ and Shooto for about 4 years.

Before this thread inevitably devolves into a giant crap tornado, everyone who's going to claim "anti-grappling", or that WC "has" every technique of BJJ, please read the grappling FAQ.

I was simply trying to talk about Applying WC on the ground.
I guess thats not possible?

That question is meaningless without context. Apply it against who? Against someone with no or limited ground skills? Sure.

Against someone trained in groundfighting? Possible, but much less likely.

Do you train with techniques that go to the ground? Then it is possible to use WC on the ground. Also, like Matt said, if you're talking about someone with no grappling experience, then you are still in a good position.

despite the overtone on the faq that grappling arts are superior to all, it does make good points. The grappling on broken glass saying that a grappler won't roll in it is kind of far fetched though.