I remember in school when this female jujistu (not bjj lol) came and trained our class in self defence, and one segment was how a girl should defend herself while being grabbed from behind before rape etc.
Anyway she shoved us this wrist after someone his holding you around you waist you grab their wrist turn a bit and they go down.
I said there is no way in hell if a 200 pound guy walks up to a 100 pound girl, grabs her around the waist that the girl could to that.
So I asked her to prove it
Anyway I took me female friend in the class after they have learned it, grabben her around the waist and said try what you just learned.
She could get my hands loose at all. OFCOURSE I already knew this.
The techer said thats because she hadnt practised it, So I asked if I could try it on her then...
She declined and said she is here to teach not so show us...
I hope you understand my spelling lol