2 Part Technique - If the opponent brings his knees together to block your Knee Slide Pass, use Collar and Elbow Control to pull up and expose space to Mount. Mounting against the Butterfly can be risky, but generally it is worth the attempt. Leg Over against the opponent when he closes his Half Guard to prevent the Mount. If the opponent reaches to block your Leg Over Pass, this can be a good opportunity to pull his vulnerable arm upwards for the Spiral Armbar from Mount. Use a Knee Parry against the opponent if he swims his leg back inside when you first stepped forward with Collar and Elbow Control.