When BJJ fails
Now before anyone gets the wrong idea and we end up getting into one of those stupid "my-art-is-better-than-your-art" clownfights, let me be perfectly clear about what I think of Brazilian jiu-jitsu.
I respect it, and its practitioners, immensely. I have great admiration for skilled grapplers; I have trained with and sparred against a few of them, and I have universally found them to be tough, resilient, and honourable warriors.
I consider BJJ to be a truly effective combat art- and there are not too many martial arts out there today to which I would apply such a label.
However, like all combat arts, BJJ has its limitations.
Like all grappling arts, BJJ works- extremely well- in a mano y mano situation. However, the moment that you put a grappler in a many-to-one situation, he immediately runs into serious problems, as demonstrated here: