1 Part Lesson — Marcelo teaches an invaluable piece of insight on attacking with 1Leg X: [I] An advanced level concept for Handfighting from Butterfly Guard is the idea of proactively defending your opponent's attempt to pass by preparing tension on his ankle with your hook. Despite after winning your grips, he or she may intend on passing through the inside by dropping 'their' knee into your Seated Guard; defend this by sliding your shin into as their lead foot departs from the mat When they rebalance from the shift, hug the lead knee close and go the Single-Leg X Guard Sweep.