There are certain submissions that I think really influence BJJ. The threat of the RNC keeps people from giving up their back and influences behavior in turtle. The threat of the Armbar from Mount and KOB affects posture. The threat of collar chokes affects gripping priority. The threat of a Triangle choke is the major influence in how the closed guard is passed. The threat of the Kimura keeps the top man from putting his hands on the mat in closed guard. The threat of the Darce choke and the Kimura against a player in bottom half guard has a major impact on the bottom man's behavior. So what are they from open guard? Are there submissions you think have a huge influence on how you behave from there? You have the Guillotine, which affects posture and head position on take downs. I feel like the ability to get into a Triangle from spider guard could be a game changer for me. I don't do it much but I'd like to. You have the threat of foot locks against someone who is lazy in their open guard, and you have knee reaping in some contests which can be a big problem for someone standing. Is there anything else?