hand grips pants below knee, forcing posted foot. other hand grips low lapel.
-half guard open- x-pass
-half guard closed- back up, stand up, knee slide
-reverse de la riva- use elbow to box out knee and drive to other knee
-z-guard- grab bottom of knee, launch off posted foot and switch legs to other side and pass
also switch to knee grip. not sure where. probably with knee slide.