I have self-defense sessions at my church and everyone in the class typically says, “If he gets out-of-bounds, I use the knee-crotch technique.”
I always tell them, don’t stop or run away. Continue the damage until he vomits and/or passes out. Once in the groin won’t stop him from coming for more.
My momma told me to grind my knee into his groin and stick my thumbs in the eye sockets and try to pop his eye balls out. Momma was a “Steel Magnolia”. Now days I’d just shoot him.