Crotchripper / Banana Split / Electric Chair. Are they illegal or legal? I have been told by multiple sources that they are illegal. They all either stretch the hamstrings, or the groin / hip joints. If they are illegal, please point to where in the rules this would be considered illegal. Their is no mention of groin, hip or hamstring anywhere in the rules. http://www.ibjjf.org/RegrasEnglish2006.pdf Their is one mention of genitalia, (if you could consider stretching the groin an attack on the genitals... that's a big stretch, pardon the pun) But this rule specifically mentions striking the genitalia.