A very common counter for your partner to use when you've already gotten the first part of the move in place (the leg staple itself) is to slide a shin across your chest or midsection, essentially a "scissor hook." While this can be an excellent guard recovery mechanism, it can also lead you right into the nuts and bolts of this pass. Start by making a big circle with your hand around and then under your partner's foot. Be sure not to simply reach back, as this will allow your shoulders to turn (and your balance to be lost). Once here, you can slide your arm down so that you are controlling your partner's hip, not just their knee or shin. This allows you to pass to either side (either the original method of hugging the head, or a more "double under" guard pass position, where you drive to the opposite side by stacking.