The Straight Jacket and Special K are a couple of submissions off of the Double Bagger control developed at 10th Planet Jiu Jitsu by Sean Bollinger.
The Double Bagger gives you total control of your opponent's posture. Once you have the DB control you work the Omoplata to set up the Straight Jacket.
The path that I have used to get the submission from started by going from Mad Dog to Go Go Plata and then hitting the Straight Jacket.
If you have the SJ locked in but your opponent doesn't tap it is real easy to transition to Special K.
