Starting from closed guard, take a same-side sleeve grip on your partner's left arm (with your right hand), and create a frame on their shoulder with your left hand, reaching across to their left shoulder. Pull their sleeve across your body to off-balance them forward, and jump over their shoulder with your legs. This is a good time to really establish the "high bite" position, recrossing your feet until you feel 100% comfortable and there is virtually no space for your partner to wiggle their left shoulder back through.

One way to help facilitate this is to squeeze your knees together, then clamp back down (each time you do this, you'll tighten the bite just a little). As soon as you establish this position, your partner will likely move to stack you, by stepping up on their left leg, while leaving their right knee on the ground, trying to drive your knee into your nose. It's important for this first move that your partner is stacking you properly, so make sure you're really getting stacked, or else the following spin movement will be all but impossible.