My dad was a green beret, and he said what he was taught would MAYBE make him a green belt in karate. Not all that much emphasis on H2H.
My dad helped write the radio communication part of the GB book. While doing that other guys did research on knife throwing. They can back with the answer "don't. Never throw a knife" a lot isn't how it is portrayed in the media
It's not your fault, there is a lot of disinformation (or out-right lies in some cases) about the Gracies/GJJ usually originating from the Gracies themselves (esp. Rorian's side of the family) or their close associates. Unless you really look into the history of GJJ/judo/jujutsu - and reliable sources in English can be hard to find - then it can be hard to tell were history ends and the sales pitch begins.I stand corrected, I was told by many that the concept of fighting from the guard position was developed by the Gracie.
So the next time somebody tells you about how badass they are due to there branches combative course, that it with a grain of salt.
I think that is the general rule of thumb on badasses, if they are truly badass they don't feel the need to tell anyone they are. Or if you want to geek out, Tywin Lannisters quote is pretty good